Question: The surface area S of a ring in shape of a torus with an inner radius r and a diameter d is given by: S

The surface area S of a ring in shape of a torus with an inner radius r and a diameter d is given by:
S = π2(2r + d)d
The ring is to be plated with a thin layer of coating. The weight of the coating W can be calculated approximately as W = γSt, where y is the specific weight of the coating material and t is its thickness. Write an anonymous function that calculates the weight of the coating. The function should have four input arguments, r, d, t, and γ. Use the anonymous function to calculate the weight of a gold coating (γ = 0.696 lb/in.3) of a ring with r = 0.35 in., d = 0.12 in., and t = 0.002 in.

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