Apacked column separator is a cylinder made of stainless steel is 30 feet long and has an outer diameter of 9 inches with a reactor wall thickness of 0.75 inches. it will be filled from end to end with iron catalyst where each catalyst pellet is considered spherical in shape and has a diameter of 0.45 inches determine the following: a) what is the inner diameter of the reactor in feet? determine the exact value then report the answer with two significant digits. b) calculate the volume of the reactor in cubic feet that will be filled with catalyst. determine the exact value then report the answer with two significant digits. c) porosity is the fraction of open space per unit volume filled with catalyst. if this catalyst has a porosity of 0.40, how many pellets will be able to fill the reactor? determine the exact value then report the answer to the nearest whole number of pellets. d) the catalyst has a unit cost of 150.00 dollars per unit. a unit equals 100 pellets. how much will the amount of catalyst that you determined in part c