PLEASE HELP ME ASAP :(

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Sketch one cycle if the cosine function y=2cos2theta