NEED HELP QUICK NO AI ANSWERS, PROBLEM 3 IS IN YELLOW

a. What do the new grid lines divide each unit square into?

b. Use the squares described in part (a) to determine a lower estimate of area a in the diagram.

C. Use the squares described in part (a) to determine an upper estimate of area a in the diagram.

d. Calculate an average estimate of the area under the curve and above the x-axis based on your upper and lower estimates in parts (b) and (c).

e. Do you think your average estimate in Problem 4 is more or less precise than your estimate from Problem 3? Explain.