Use Week $2$ total sales,$772,748,775,$ Week $3554,528,506,$ Week $4838,785,834,$ Week $5521,519,500,$ week $6723,790,723,$ Week $7510,556,520,$ Week $8818,773,800,$ Week $9479,491,486,$ Week $10825,822,757,$ Week $11533,513,540,$ Week $12839,791,832,$ Week $13484,480,508,$ Week $14686,683,708,$ Week $15543,531,530,$ and Week $16767,743,779.$ Compare the results to the observed sales. Does the accuracy of the model seem to be different when coupons are used or not? When advertising is used or not? Use an excel file to answer