A building owner is evaluating the following four alternatives for leasing space in an office building for the next five years. As part of the lease option evaluation, calculate the effective rent to the owner (after expenses) for each lease alternative using a 9% discount rate. gross lease: rent will be $30 per square foot each year with the lessor response will for payment of all operaring expenses. Expenses are estimated to be $9 during the first year in decreased by 1 dollar per year thereafter. (prepare an excel spreadsheet)