Using bash, please help me get this done in the easiest way possible. (I need help with #4)

Customer_and_Contacts file:

1. 2. 3. 4. Write an interactive script to add a person's personal information to your customers_and_contacts file. 5 points Your file should not have duplicate entries in it. Write an interactive script to remove an entry from your customers and contacts file. Incorporate appropriate error checking in this and all the other scripts. 5 points Write a script to look up someone in your customers and contacts file. Your script should look up an entry based on any arguments passed. If no arguments are passed then it should be interactive. Return to the screen the name, phone number, and street address. We are using it like phonebook lookup. 10 points Private information should not be returned. Write a bash script that takes an integer passed as a command line argument and outputs the equivalent in Roman Numerals. The rules are: I-1 V-5 X = 10 L=50 C-100 D=500 M=1000 There will be no more than three consecutive occurrences of the same letter. I can be placed before V and X indicating it is subtracted such as in IV = 4 and IX = 9. Likewise X can be placed before L and C and C can be placed before D and M. There is no zero and numbers greater than or equal to 4000 cannot be converted. Your script should error check the input. 10 points Address, City, the sample entry below. New contacts are appended as they occur. David Webb Box 34 Rural Route 2 Nixa MO 65714 (417)555-1478 555-66-7788 09-13-1970 Martha Kent 1122 North Hwy 5 Smallville KS 66789 (785)555-2322 343-55-8845 04-17-1965 Edward Nygma 443 W. Broadway Gotham City NJ 12458 (212)743-3537 785-48-3524 08-08-1987 followinenrohlems. Be sure to include sample data that will