Need Solution to this question

Write a program which create n number of main directories / folder and n number of sub directories / sub folders in each main directory / folder. Number and names of main directories and number and names of sub directories are passed as command line argument. Create all folders in current working directory, or you can make them at /home/oracle/Desktop. For example, ./ Lab_mid_q1 3 mid1 2 q1 q2 mid2 2 q1 q2 mid3 1 q1 For above example, your program should create 3 main folders "midl", "mid2" and "mid3". "midl" has 2 sub-folders "q1" and "q2" "mid2 has 2 sub-folders q1" and "q2" "mid3" has 1 sub-folder "q1". Use mkdir and execv system calls. Use man command if you don't know how to use these system calls