Write an assembly language program that calls a subroutine which replaces all ASCII digits (0-9) of a string with the # symbol. Memory location of the string is passed on the top of the stack. The string is terminated with the null symbol, value = 0.

Write an assembly language subroutine that checks whether a number (passed in R0) is a prime number or not. If it is prime, 1 is returned in R1. If not prime, 0 is returned. Write a main program which calls this subroutine and counts the number of primes between 10 and 1000, and displays that number to the screen.