1. (Displaying Strings in Uppercase and Lowercase) Write a program that inputs a line of text into char array s[100]. Output the line in uppercase letters and in lowercase letters.

2.(Tokenizing Telephone Numbers) Write a program that inputs a telephone number as a string in the form (555) 555-5555. The program should use function strtok to extract the area code as a token, the first three digits of the telephone number as a token and the last four digits of the phone number as a token. The seven digits of the phone number should be concatenated into one string. The program should convert the area-code string to int and convert the phone-number string to long. Both the area code and the phone number should be printed.