diff --git a/.github/workflows/run_test.yml b/.github/workflows/run_test.yml
new file mode 100644
index 00000000..1bd3e50e
--- /dev/null
+++ b/.github/workflows/run_test.yml
@@ -0,0 +1,32 @@
+name: simple_calculator unit test
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      - name: Lint with Ruff
+        run: |
+          pip install ruff
+          ruff --format=github --target-version=py310 .
+        continue-on-error: true
+      - name: Test with pytest
+        run: |
+          coverage run -m pytest tests/tests_1b.py -v -s
+      - name: Generate Coverage Report
+        run: |
+          coverage report -m
\ No newline at end of file
diff --git a/labs/lab_1/lab_1a.py b/labs/lab_1/lab_1a.py
index 9d15ec83..bf41a334 100644
--- a/labs/lab_1/lab_1a.py
+++ b/labs/lab_1/lab_1a.py
@@ -1,5 +1,8 @@
 """
 lab_1a.py
+robot_speed = 8 # m/s
+
+
 
 The first lab in the BWSI CSS course. To complete this lab, fill out the variable on line 10
 with your name. Then, save the code, add it to the staging area, and commit it to the Git tree.
@@ -8,7 +11,7 @@
 def main():
     print("Hello World!")
 
-    name = "" # TODO: Insert your name between the double quotes
+    name = "Aditya Meruga" # TODO: Insert your name between the double quotes
 
     print(f"{name}, Welcome to the CSS course!")
 
diff --git a/labs/lab_1/lab_1b.py b/labs/lab_1/lab_1b.py
index e58dd957..a6ccc24e 100644
--- a/labs/lab_1/lab_1b.py
+++ b/labs/lab_1/lab_1b.py
@@ -37,14 +37,34 @@ def simple_calculator(operation: str, num1: float, num2: float) -> float:
     else:
         raise ValueError("Invalid operation. Please choose from 'add', 'subtract', 'multiply', or 'divide'.")
 
+def valid_number(prompt: str) -> float:
+    valid = False
+    while valid == False:
+        try:
+            number = float(input(prompt))
+            valid = True  # only reaches here if float() worked
+        except ValueError:
+            print("That's not a number, try again!")
+    return number
+
+def valid_operation(prompt: str) -> str:
+    valid_operation= False
+    while valid_operation == False:
+        operation = input(prompt)
+        if operation == "add" or operation == "subtract" or operation == "multiply" or operation == "divide":
+            valid_operation = True
+        else: 
+            print("That's not a valid operation!")
+    return operation
+
 def main():
     
     print(f"===== Simple Calculator =====")
 
     # Ask the user for sample input    
-    num1 = float(input("Enter the first number: "))
-    num2 = float(input("Enter the second number: "))
-    operation = input("Enter the operation (add, subtract, multiply, divide): ").strip().lower()
+    num1 = valid_number("Enter the first number: ")
+    num2 = valid_number("Enter the second number: ")
+    operation = valid_operation("Enter the operation (add, subtract, multiply, divide): ")
 
     # Perform the calculation and display the result
     result = simple_calculator(operation, num1, num2)