Question

Sample space ={1,2,3,4,5}
p(1)=0.1, p(2)=0.2 and p(3)=p(4)=0.05. Assume that A={1,3,5} and B={2,3,4}.
Find p(5).
Find p(A^c).

I need help with this question. It is a probability question.
please help.