Write a program where: Your main() function must create two pipes and make them global. create two child processes. Each child process will call one of the functions defined in (2) and (3) below. wait() for a child process to end. Then, send the SIGUSR1 signal to the (2) process before ending. One function should have an integer variable that starts at 0. It should print ping: {value} then increment the value. It should write that value to a pipe and read the value back from the other pipe until the value is greater than or equal to 100. It should call exit() when complete. The other function should set up a signal handler for SIGUSR1 to call a function (defined in (4) below) when it receives that signal. It should then loop forever: read from a pipe, print pong-{value}, increment the value and write the value to the other pipe. These pipes must be opposite from the function in (2): the pipe you write to in (2) must be the pipe that you read from in (3) and vice versa. Create a function for the signal handler that should print pong quitting and then exit(). Here is what the output must look like:  ./pipes_signals ping: 0 pong: 1 ping: 2 pong: 3 ping: 4 pong: 5 ping: 6 pong: 7 ping: 8 pong: 9 ping: 10 pong: 11 ping: 12 pong: 13 ping: 14 pong: 15 ping: 16 pong: 17 ping: 18 pong: 19 ping: 20 pong: 21 ping: 22 pong: 23 ping: 24 pong: 25 ping: 26 pong: 27 ping: 28 pong: 29 ping: 30 pong: 31 ping: 32 pong: 33 ping: 34 pong: 35 ping: 36 pong: 37 ping: 38 pong: 39 ping: 40 pong: 41 ping: 42 pong: 43 ping: 44 pong: 45 ping: 46 pong: 47 ping: 48 pong: 49 ping: 50 pong: 51 ping: 52 pong: 53 ping: 54 pong: 55 ping: 56 pong: 57 ping: 58 pong: 59 ping: 60 pong: 61 ping: 62 pong: 63 ping: 64 pong: 65 ping: 66 pong: 67 ping: 68 pong: 69 ping: 70 pong: 71 ping: 72 pong: 73 ping: 74 pong: 75 ping: 76 pong: 77 ping: 78 pong: 79 ping: 80 pong: 81 ping: 82 pong: 83 ping: 84 pong: 85 ping: 86 pong: 87 ping: 88 pong: 89 ping: 90 pong: 91 ping: 92 pong: 93 ping: 94 pong: 95 ping: 96 pong: 97 ping: 98 pong: 99 Pong quitting   Please show the full output and code. There must be no errors