For each problem, write one or two equations to represent the situation and then solve. Be sure to define your variable(s) and clearly answer the question. a. The Lees have three children. The oldest is twice as old as the youngest. The middle child is five years older than the youngest. If the sum of the ages is 57, how old is each child? b. In Katy's garden there are 105 ladybugs. They are increasing at two ladybugs per month. There are currently 175 aphids and the number of aphids is decreasing at three aphids per month. When will the number of ladybugs and aphids in Katy's garden be the same?