[1. Which type of car ash is the best? [11] points] A local husinessperson seeks to open a new car wash. He is considering four different suppliers for the washing system, each 1with its own costs and benets. The cash ows related to each option are listed in Table l. The husinessperson uses a some of 19% for his economic analyses. (a) Compute the internal rate of return for each option. {4 points} {Is} Assume for the moment that the options constitute independent projects. In this case, determine which option{s} should be chosen by using an approach based on (c) Repeat the previous step by assuming that the options are mutually exclusive (which they would he in this case]. {5 points) Table l Cash ows associated to the different suppliers for the car washing system