Exercise 1: Write a program to read through a file and print the contents of the file (line by line) all in upper case. Executing the program will look as follows: python shout.py Enter a file name: mbox-short.txt FROM STEPHEN.MARQUARD@UCT.AC.ZA SAT JAN 5 09:14:16 2008 RETURN-PATH: RECEIVED: FROM MURDER (MAIL.UMICH.EDU [141.211.14.90]) BY FRANKENSTEIN.MAIL.UMICH.EDU (CYRUS V2.3.8) WITH LMTPA; SAT, 05 JAN 2008 09:14:16 -0500