The standard size boxes that XYZ Moving Company uses are labeled size 2, 4, and 8. If XYZ's box is size x, then the conversion between XYZ's box and the box of its competitor Q Rentals is q=1/2(x+4). Another moving company, Rover's Rigs, uses box sizes that are 3 times the size number of Q Rentals' box sizes.

a) What is the equivalent box size of Rover's Rigs boxes sizes 2, 4, and 8?
b) What are the two different ways you could solve this composition of functions problem? Which one do you feel works better in this situation?

Please help me answer these questions!