(a) Verify the 2 and 3 trial binomial probabilities, that were used to calculate a fair derivative price in the 2 and 3 step binomial models: bin(0; 2,5) = 2 bin(1;2,5) = 2pa bin(2;2,0) = p2 bin(0;3,5) = 3 bin(1;3,0) = 2pa2 bin(2;3,7) = 3p? bin(3; 3,0) = P3 Where q = 1-P (10 Marks) (b) Derive the risk neutral expectation formula for the price of a derivative in the three-step binomial model D3 Do = Ebin (15 Marks)