I need help on these 2 Calculus Questions:

WeBWorK 4 - Topics 8 - 9: Problem 3 (1 point) A rectangular storage container with an open top is to have a volume of 10m3. The length of its base is twice the width. Material for the base costs $ 10 per square meter. Material for the sides costs $ 6 per square meter. Find the dimentions and the cost of materials for the cheapest such container. Width: m Length: m Height: m Cost: $ 1 n: I n; I m WeBWorK 4 - Topics 8 - 9: Problem 4 (1 point) Consider the function f (as) = 5a:2 + 6x 2. Find the critical point, A, of the function. A: I It! At a: = A. does f (.2) have a local min, a local max, or neither? Type in your answer as LMIN, LMAX, or NEITHER