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l. The Bayou City Symphony accepts season ticket subscriptions during an interval (0, t) starting time 0. We assume that each subscription entails the purchase of one season ticket costing 0 dollars payable at the time of purchase. Assume that the arrivals of subscription orders follow a Poisson process with a rate of K, and that the symphony is able to accommodate all purchase requests. Let B be the discount factor. A dollar received 3 time units from now will have the present value of e'\" . Compute the expected present value at time 0 of all revenues received from the ticket sales in (0, t). Consider a variant of the problem. All assumptions remain unchanged except that with probability pi a subscription is for 1' tickets, where i= 1, , 4. Compute the expected present value at time 0 of all revenues received from the ticket sales in (0, t)