4. Bonus (up to 15pts) Create a subroutine that converts a string of at least a five-digit number to its numerical value by using the Hardware Multiplier, and stores the result in a variable in the memory. The subroutine needs to receive the base address of the string and the address of the variable through the program stack. For full credit you need to use the accumulator. If the accumulator is not used only up to 10pts will be rewarded. 4. Bonus (up to 15pts) Create a subroutine that converts a string of at least a five-digit number to its numerical value by using the Hardware Multiplier, and stores the result in a variable in the memory. The subroutine needs to receive the base address of the string and the address of the variable through the program stack. For full credit you need to use the accumulator. If the accumulator is not used only up to 10pts will be rewarded