A national park records data regarding the total fox population $F$ over a 12 month period, where $t = 0$ means January 1, $t = 1$ means February 1, and so on. Below is the table of values they recorded:

(a) Is $F$ a function of $t$
A. Yes
B. No

(b) Let $g(t) = F$ denote the fox population in month $t$. Find all solution(s) to the equation $g(t) = 143$. If there is more than one solution, give your answer as a comma separated list of numbers.
$t =$