Dark Skies Observatory is considering several options to purchase a new deep-space telescope. Revenue would be generated from the telescope by selling "time and use" slots to various researchers around the world. Four possible telescopes have been identified in addition to the possibility of not buying a telescope if none arc financially attractive. The table below details the characteristics of each telescope. MARR is 15%/year. Use the built-in functions in Excel to compare between the 4 design alternatives according to the following methods: 1 - Present Worth method 2- Future Worth method 3- Annual Worth method