In QtSpim

(50 points) Write a program to evaluate 3ab - 2bc -5a + 20ac - 16 Prompt the user for the values a, b, and c. Try to use a small number of registers. Use the stack to hold intermediate values. Write the final value to the monitor. 1. Hint: please use'syscall learned in Chapter 22 to read string and print integer and use stack operations learned in Chapter 25 to hold intermediate values. You may also look at the example in Chapter 25