Can you do 2, 3 and 4

1. Use formal substitution to find the indefinite integral. 3. A company produces a product for which the marginal cost of producing x units is modeled (a). (4-x )' x de _ 1 dx 50" x +10, and the fixed cost is $1,000. (a) Find the total cost function and the average cost function. (b). [(x -6x) (x-3) dx (b) Find the average cost of producing 200 units. (c). [x4x' -5 dx 4. Find the second partial derivatives for the function f(x,y) = x - 3x y' + y' and evaluate it at the point (1, 0). 2. Find the center and radius of the sphere x'+y'+z' +4x-2y+82-4=0