Please show me how to solve this correctly with steps, thank you

A property owner is evaluating the following altematives for leasing space in his office building for the next five years: Net lease with steps. Rent will be $15 per square foot the first year and will increase by $2.80 per square foot each year until the end of the lease. All operating expenses will be paid by the tenant. Net lease with CPI adjustments. The rent will be $17 per square foot the first year. After the first year, the rent will be increased by the amount of any increase in the CPL. The CPI is expected to increase 9 percent per year. Gross lease, Rent will be $31 per square foot each year with the lessor responsible for payment of all operating expenses. Expenses are estimated to be $7 during the first year and increase by $1 per year thereafter. Gross lease with expense stop and CPI adjustment. Rent will be $27 the first year and increase by the full amount of any change in the CPl after the first year with an expense stop at $9 per square foot. The CPI and operating expenses are assumed to change by the same amount as outlined above. Required: a. Calculate the effective rent to the owner (after expenses) for each lease alternative using a 11 percent discount rate. b. How would you rank the aiternatives in terms of risk to the property owner? Complete this question by entering your answers in the tabs below. Calculate the effective rent to the owner (after expenses) for each lease alternative using a 11 percent discount rate. (Do not round your intermediate calculations. Round your final answers to two decimal places.)