solve both questions hand written and show work

1. We roll two fair 6-sided dice. Let A be the event \"the sum of the points is 7\2. A random variable has the following probability mass function X 2 4 6 p( X = x) 0.1 0.3 0.4 0.2 (a) What is the expected value of X? (10 points) (b) Draw the CDF curve of X (10 points)