Suppose that the annual cost C(d) ($) of a pipeline can be expressed as a function of the pipe diameter d (in.) as follows: 1. Plot C(d) versus d. 2. Find the optimal value of d using a MATLAB’s...

Suppose that the annual cost C(d) ($) of a pipeline can be expressed as a function of the pipe diameter d (in.) as follows:1. Plot C(d) versus d. 2. Find the optimal value of d using a MATLAB’s built-in function. 3. If d should be within the interval [1, 3], what will be the optimum annual cost? Use a MATLAB’s built-in function that solves constrained optimization problem.