Use the UNIX environment to write two C programs as follows:

1. Simulate the UNIX utility time that shows the time taken by a program. The command line syntax should be as follows: (mytime command). This program should invoke a program which gets the CPU time, forks a child to run command and when the child returns gets the CPU time again and prints the difference between the two times.

2. Use sigaction and pause to write a function that simulates the sleep function.