Problem 7 (10 points) Write a Julia function for each of the following mathematical expressions and find the value of the function when x = 2.5. (Show your commands and output. You must write a proper Julia function not just use an expression or evaluate on a different device.) The function f(x) = sin (4x) - cos(x5). The function g(x) = (x-2) + (x 8)2. - Sin (4*2.5) - Cos (2.55) Problem 8 (5 points) Define a Julia function f(x) which describes the line with slope 30 that goes through the point (20, 10). Find its value at x = 432. Show your commands and the output.