We want to build 5 letter words using only the first n 10 letters of the alphabet For example if n 5 we can use the first 5 letters a b c d e Recall words are just strings of letters not necessarily actual English words a How many of these words are there total b How many of these words contain no repeated letters c How many of these words start with the sub word ade d How many of these words either start with ade or end with be or both e How many of the words containing no repeats