Please help me with these thank you so much
1.) If f(x)=c(X^2+1/2), for x=0,1,2,3, can serve as a probability distribution of the discrete random variable X, what is c?
Choose from
A. 1/16
B. 1/8
C. 1/4
D. 1/2
2.) Let X be a random variable with f(x)=3X-4, X>1. Then the mean of X is . Use a decimal to answer.