Let S(0) = $100, K = $105, r = 8%, T = 0.5 and δ = 0. Suppose that u = 1.3 and d = 0.8. Using the one-period binomial model, calculate the following:
a. The fair premium for a European put with the above characteristics.
b. The ? in the corresponding replicating portfolio.
c. The amount B invested in the riskless asset in the replicating portoflio.