Considering fins with adiabatic tips, plot the fin efficiency, _f, as a function of length (from 1 to 20 cm) for fins made of iconel 625 (a high temperature alloy of k = 20 w/m-k) with the following geometries: a rectangular straight fin with a width of 5 cm and a thickness of 0.5 cm a parabolic straight fin with a width of 5 cm and a thickness of 0.5 cm at the base. a rectangular pin fin (cylindrical) with a diameter of 1.8 cm. a triangular pin fin with a diameter of 1.8 cm at the base for (a-d) assume that the convection coefficient is h= 8 w/m^2-k in all circumstances. for better comparison, plot all four cases in the same graph. comment on the general rules for fin selection if you need to design a fin system.