Problem 2. Consider calculating the net area under the function f(x) = 4 - 0.01r over the interval [0, 50]. (a) Graph the function over the interval (0,50). Shade the area under the curve, and indicate which portion is "positive" area and which is " negative" area. (b) Do you expect the net area to be positive or negative? (c) Use Wolfram Alpha to calculate the net area exactly. Include a screenshot of the results Problem 3. Write an expression that represents the area between the two functions y = g-4it + 15 and y = x + 4 over the interval [5.9). Then evaluate ming Wolfram Alpha. Inchule a screenshot of the results. Problem 4. The marginal cost (rate of change of total cost) in dollars per unit is being modeled by the function C'(g) = 0.03y' -q + 16. Write an expression for the the total ( net ) change in the total crat from the tal coat from the production level g = 5 to time g = 2 evaluate ming Wolfram Alpha. Include a screenshot of your results. Problem 5. Suppose the systolic blood pressure of a patient in response to was taken. Write an expression for the average value of the systolic blood pressure Sit) over the interval [0. 38). Then use Wolfram Alpha to evaluate and include a screenshot the results