By Possessives, Capital letters

Hi, Are no.2 and 3 the same possessives as no. 1? 1. looking at a mailman's bag -- looking at the bag of a mailman 2. overcoming Writer's Block -- overcoming the Block of Writer?? ( I guess 'Writer' in the capital letter is used as sort of a title similar to 'Teacher' or 'President'.) but how...

Hi, This is nicely written overall. You need to remove all the random capital letters that are scattered throughout the essay and double check some of your possessives - customers' is required in one or two places. there hands - their hands.