Two neighboring towns, Nash Town and Bay Town, were surveyed, and their populations were found to be x 1/3+2x 1/5 and 3x 1/3-x 1/5 (in thousands), respectively, where x is the number of years since the towns were founded. (Assume that both towns were founded at the same time.) Question 1: Find the function that gives the total population of both towns.

Question 2: Find the function that gives the difference of the populations of Nash Town and Bay Town.