You work for Lilly flowers, florist business. You've collected data on monthly sales (S, number of regular-sized bouquets per month) the price of your regular-sized bouquets (P, in dollars), and the population size in the different towns in which your business operates (N, number of people; you currently only have one business in each town). You estimate the resulting regression model: S = a + bP + cN. In your regressions, you usually look for a 10%-or-better level of confidence.

a.What signs do you expect for a, b, and c?

b.Your regression yields the following results:

\f