CODE IN PYTHON 2.7

Given the following string "" "Mary had a little lamb its fleece was white as snow and everywhere that Mary went the lamb was sure to go""" Compute the average length of the words in it. 2. Excluding redundancies in the words, re-compute the average length of the words. For 2 above, you want to remove repeated words. For instance, one,two, three, two after removing the redundancies becomes one,two, three. The words are case-sensitive