1. Rewrite the word counting program from Section 5.7 so that the user can specify the name of the input file. Also, modify the proso that all non-letters are removed from each word as gram it is...

1. Rewrite the word counting program from Section 5.7 so that the user can specify the name of the input file. Also, modify the proso that all non-letters are removed from each word as gram it is read, and all uppercase letters are converted to the corresponding lowercase letter.

2. Write an interactive program that uses a TreeMap to store the names and phone numbers of your friends.