A population has size 7 at time $t = 0$, with $t$ measured in years.

(a) If the population grows by 11 people per year, find a formula for the population, $P$, at time $t$.
$P =$ help (formulas)

(b) If the population grows by 11% per year, find a formula for the population, $Q$, at time $t$.
$Q =$ help (formulas)

(c) On a piece of paper, graph both functions on the same axes.