Suppose dice had four sides instead of six, so rolling

Question: Suppose dice had four sides instead of six, so rolling a single die

1. Suppose dice had four sides instead of six, so rolling a single die would produce equally likely numbers from 1 to 4, rolling two dice would produce numbers from 2 to 8.
2. Compute the probability distribution of outcomes from rolling two dice.
3. Calculate the mean, standard deviation, and coefficient of variation of the distribution.