3. An engineer suspects that the surface nish of a metal part is inuenced by the feed rate and the depth of cut. He selects three feed rates and four depths of cut. He then conducts a factorial experiment and obtains the following data: Dataset: p3 in Excel sheet Depth creme) Feed seemee) mm mm mum. -mm m -s- o m min 0.2 0.25 .3 __ (a) Analyze the data, construct the AN OVA Table, and draw conclusions. Use c. = 0.05. (b) Prepare appropriate msidual plots and comment on the model's adequacy. (c) Obtain point estimates of the mean surface nish at each feed rate. (d) Find the Pvalues for the tests in part (a)