A standard 6 sided die is rolled three times.

1. What is the expected value of the first roll ?
2. What is the expected values of the sum of the three rolls ?
3. What is the expected number of twos appearing in the three rolls ?
4. What is the expected number of sixes appearing in the three rolls ?
5. What is the expected number of odd numbers ?

Based on [Pitman, p. 182 #3]