4 A spinner has five equal sectors numbered 1, 2, 3, 4, 5. Here are the results of 400 spins.

Find the experimental probabilities of a i 2 b Find the theoretical probabilities of an odd number iii 4 or 5 i 2 ii an odd number 4 or 5 C Do you think the spinner is fair? Give a reason for your answer.

Score Frequency 1 2 90 83 23 3 4 5 86 66 75