Spinner results against the theoretical model

A spinner is divided into three sectors: red with angle \(72^\circ\), and blue and green each with angle \(144^\circ\). Ama spins it \(200\) times and records red \(46\) times, blue \(81\) times and green \(73\) times.

1. Use Ama's results to estimate the probability of red.[1]
2. Find the theoretical probability of each colour, stating the assumption you make.[2]
3. Ama says her results show the spinner is unfair. Comment on her claim.[2]
4. Using the theoretical model, find the expected number of reds in \(500\) spins, and find the probability that a single spin does not land on blue.[2]