please answer quickly

Problem 5 (20 Points) With a 4MHz clock (1 million instructions/second). Write a 4 loop delay program that will run for 170 minutes. Just write it as a subroutine, do not write a main program. Assume loop variables are already defined (memory has been reserved). Your delay must be within 1% of 170 minutes. (I recommend you use Tim Bambeck's 4-loop delay program.)