Modify wgrep to take an optional -w option that specifies the window size; so wgrep -w 3 UNIX text should print three lines before and after each...

please help me these 2 question. Thank you

1.Modify wgrep to take an optional -w option that specifies the window size; so

wgrep -w 3 UNIX text

should print three lines before and after each line from text that contains the pattern UNIX.

2.Modify wgrep to take a variable number of filenames as arguments. Precede each output line with the name of the file in which the match occurs (as grep does).

7: Modify wgrep to take an optional -w option that specifies the window size; sowgrep -w 3 UNIX textshould print three lines before and after each line from text that contains the pattern UNIX.8: Modify wgrep to take a variable number of filenames as arguments. Precede each output linewith the name of the file in which the match occurs (as grep does).