Linux. Any help would be awesome! I feel as I am close but my commands are off a little.

1. Consider the file whotb below:

-bash-3.2$ cat whotb

avuong1 pts/0 2017-08-25 23:00 (10.152.100.245)

pbartakk pts/11 2017-08-25 23:29 (174.17.211.48)

zzhan281 pts/3 2017-08-25 22:52 (71.223.35.124)

jgamboa8 pts/2 2017-08-25 23:05 (71.231.248.218)

pkalungi pts/1 2017-08-25 20:12 (10.143.198.41)

ramdisk pts/20 2017-08-22 17:17 (10.106.150.87)

pbartakk pts/8 2017-08-25 22:22 (10.152.112.188)

pkalungi pts/10 2017-08-25 23:18 (10.143.198.41)

a. Display only (in order) the station #, username, and date logged in order b. Sort the above in increasing order of the station # c. Sort the same data in reverse order d. Create a file called useron that contains only the usernames e. Sort the file useron in reverse order, removing the duplicate, and saving with the same filename f. Insert line numbers into the file useron above, starting at 100 and in increment of 10

2. Consider the address book below:

$ cat addr

Xiao Li, lxiao@unc.edu, 6705462234, Jackson, NC 764

Natkin William, wnatkin@imap28.vcu.edu, 8044344528, Richmond, VA 22345

Elizi Moe, emoe@ncsu.edu, 5208534566, Tempe, AZ 85282

Ma Ta, mta@yahoo.com, 4345667345, Austin, TX 91030

Diana Cheng, dcheng@asu.edu, 5203456789, Matitsi, WY 4587

Jackson Five, jfive@ncsu.edu, 5206564573, Kyenta, AZ 85483

Adi SrikanthReddy, sadi1@imap1.asu.edu, 6578904566, Wyo, WS 67854

a. Sort the addr file by phone number and print lines 1 thru 3.

3. Consider the address book below:

$ cat addr

Xiao Li, lxiao@unc.edu, 6705462234, Jackson, NC 764

Natkin William, wnatkin@imap28.vcu.edu, 8044344528, Richmond, VA 22345

Elizi Moe, emoe@ncsu.edu, 5208534566, Tempe, AZ 85282

Ma Ta, mta@yahoo.com, 4345667345, Austin, TX 91030

Diana Cheng, dcheng@asu.edu, 5203456789, Matitsi, WY 4587

Jackson Five, jfive@ncsu.edu, 5206564573, Kyenta, AZ 85483

Adi SrikanthReddy, sadi1@imap1.asu.edu, 6578904566, Wyo, WS 67854

a. Print the lines with imap number in the email address.

b. Print the lines that end with valid zip code

c. Print the lines that end with invalid zip code