Suppose S = 466 + 2.5? and N = 2 + 6.5r represent the population (in thousands) of two cities, South Gulch and North Gulch, respectively. Determine the number of years it will take for their populations to be (a) equal, and (b) for South Gulch to have twice as many inhabitants as North Gulch. Also report the population of the towns for each situation. (a) In how many years will the population of South Gulch equal that of North Gulch? Number years What will be their populations? Number thousand people