Write functions:

numWords - Given a string, return the number of words it contains. A word is defined to be a sequence of alphabetic (isalpha) characters with non-alphabetic characters on each side. If alphabetic characters start or end the string, they are considered a word. The best method to solve this is to use the isalpha function to determine the beginning and end of each string.

characterCounts - Given a string, return a vector of ints of length 26 containing the number of times each letter was seen. Index 0 corresponds to a, 1 to b, etc Treat upper-case letters as lower-case.

convertToUpper - Given an input string convert all alphabetic characters to uppercase. Return a new string converted to uppercase. If the input string is empty just return the input string.

string convertToUpper(const string &to_be_converted){ // TODO: Fill me in

}

unsigned int numWords(const string &countme){ // TODO: Fill me in }

vector characterCounts(const string &countme){ // TODO: Fill me in }