open-endear 13. 5 balls of the same size are marked with positive integers 1, 4, 7, 10 and x respectively and put in a bag. A ball is drawn from the bag at random and the number is noted. (a) Suggest a value for x such that the expected value of the number on the ball drawn is greater Explain than 5 but less than 7. on 209 gunshotism To lume arlf isales gnow IM (b) Is it possible that the expected value of the number is less than 4? Explain your