At the time of writing, the share price of CAR is $18.86. Assume this is time zero. You wish to compare premium prices of a European call calculated with the BlackScholes model, with premium prices calculated with a binomial model. The call has strike price K = $20, and expires in 90 days so T = 90/365 years. The yearly volatility of CAR shares is estimated to be = 2.55 . Assume the continuously compounding interest rate is r = 3% pa. (a) Calculate the call premium using the Black-Scholes model. (b) Consider a three-step binomial CRR model. (i) Assuming interest rates are constant over the life of the call, calculate the return R over one time step. (ii) Calculate the up and down factors u and d in this three-step model. (iii) Calculate the risk neutral probability in this three-step model. (iv) Construct a three-step binomial pricing tree for the call and calculate its premium.