Task $4$

Write a subroutine called "Area" that calculates the area of a rectangle. The length and the width of

the rectangle are passed to the subroutine using accumulators A and $B,$ respectively. Store the $16-$bit

return value in global memory $($use dc$.$b to declare a variable to store the result$).$ Then simulate your

code and verify the result. Take a screenshot of the final result in memory.

Task $5_{?}$

Rewrite the program from Task $4$ but use the stack to pass all data to and from the subroutine. In

addition, the return value should be returned to the main through the stack. Take a screenshot of the

stack every time a stack operation is executed. Draw the stack diagram for your program.