$[20$ points$]$ Write a $\frac{C}{C}++$ program that is able to carry out the following tasks:

a$)$ The parent process creates two child processes, named as Alice and Bob, respectively.

b$)$ The parent prints out the process ID of Alice and Bob when the parent creates them. The output should look as follows:

From Parent: Alice ID is xxxx $//$comment: here xxxx is Alice's PID

From Parent: Bob ID is yYyy $//$ here yYyY is Bob's PID

c$)$ The parent waits for the two children to finish their work before exiting.

d$)$ Child Alice prints out the following string, then exits.:

Hi$,$ I am Alice

e$)$ Child Bob prints out the following string, then exits:

Hi$,$ I am Bob