I need help pleaseee plz?

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Which one ? is the answer and how to find this answer

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?