4. Find an equation of the tangent line for the following functions at the given points (30 points) _x_ 3. y 17+ : at a point (0, -1) (5 points} b. y=f(x)=v'2x2 7 at a point (4, 5) (5 Points) e. y=eos( 29:) at a point (TE, 1} (5 points) d. y=f(x}=(2x+3}(x3 + 2x + 1) at a point (1. 20) (5 points) e. x2 + 4x}: + y3 = 8 at a point (0, 2) (10 points) . A poster is to contain 50 square inches of print material. The margins at the top and bottom of the poster are to be 4 inches, and the margins on the left and right are to be 2 inches. What should the dimensions of the poster be so that the least amount of poster area is used? (20 points) 6. Find extrema for a function y=f{x)=2x2 4 8x on an interval [0, 6}. (10 points) Deni