I would like to ask how to solve the following question? Please provide all the detailed steps. Thank you.

Q3: Unbiasedness (Simulation) Dr. Slump has investigated a deliberately biased six-sided die, with the following probability distribution for a random variable X of the number of spots on the upper most face when the die is tossed: X 1 2 3 4 5 6 Px (x) 1- 0 1 - 0 1 - 0 1+0 1+0 1+0 6 6 6 6 6 6 a) Justify why 0 must be in (-1, 1). b) Find E(X) in term of 0