7. A project engineer with EnvironCare is assigned to start up a new office in a city where a 6-year contract has been finalized to take and to analyze ozone-level readings. Two lease options are available, each with a first cost, annual lease cost, deposit-return (at the end of the lease period) estimates shown below. a First Cost, $ Annual lease cost, $per year Deposit return,$ Lease term, years Location A -15,000 -3,500 1,000 6 Location B -18,000 -3,100 2,000 9 a. Determine which lease option should be selected on the basis of a present worth comparison using least common multiple planning horizon, If MARR is 15% per year. b. EnvironCare has a standard practice of evaluating all projects over a 5-year period. If a study period of 5 years is used and the deposit returns are not expected to change, which location should be selected? C. Which location should be selected over a 6-year study period if the deposit return at location B is estimated to be $6,000 after 6 years