*pt $247 1070_ Mr. Giuseppe Bianchi is thinking to interrupt his electricity supply contract with Enel in ba 068 EXERCISE 4 house in Sicily and to install a new energy plant with solar panels (today purchased at 15.000 euro) to supply the annual energy needs of this house. By calculating annual medium solar exposition in that area, it can be estimated that the plant should produce energy for 4500 KWh every year. Moreover Giuseppe Bianchi knows that annual medium consume of energy is 2700 KWh and that Enel's cost today for buying energy is 0,2 /KWh plus 20 euro every semester. By considering that the new solar energy's plant would lead to annual costs of maintenance of 300 euro (100 euro of insurance) and that lifetime is 20 years, established with VAN and recovery period's Assume also an annual discount rate of 5% and ignore tax rate (r=0). 170 D Weedlculate, if the investment is convenient to Giuseppe. 21_0 1070 80107 (ory not