I hope you can help me with these showing the step by step explanation

Group Work Solve the following problems using Analysis of Variance. Determine the appropriate test type (one-way or two-way). Coordinate with your group mates in solving the problems. 1. An advertising agency has been hired by a manufacturer of pens to develop an advertising campaign for the upcoming holiday season. To prepare for this project, the research director decides to initiate a study of the effect of advertising on product perception. An experiment is designed to compare five different advertisements. Advertisement A greatly undersells the pen's characteristics. Advertisement C slightly oversells the pen's characteristics. Advertisement B slightly undersells the pen's characteristics. Advertisement D greatly oversells the pen's characteristics. Advertisement C attempts to correctly state the pen's characteristics. A sample of 30 adult respondents, taken from a larger focus group is randomly assigned to the five advertisements. After reading the advertisement and developing a sense of "product expectation" all respondents unknowingly receive the same pen to evaluate. The respondents are permitted to test their pen and the plausibility of the advertising copy. The respondents are then asked to rate the pen from 1 to 7 on the product characteristics scales of appearance, durability, and writing performance. The combined scores of three ratings for the 30 respondents are as follows. A B C D E 15 16 8 5 12 18 17 7 6 19 17 21 10 13 BT 19 16 15 11 12 19 19 14 9 17 20 17 14 10 14 a. At 5% level of significance, is there evidence of a difference in the mean rating of the five advertisements? b. Which advertisement should you use and which advertisement should you avoid? Explain. 2. The following data represent the final grades obtained by 10 students in Mathematics, English, Filipino and Biology: Student SUBJECTS Mathematics English Filipino |Biology 68 57 73 61 83 94 91 86 72 81 63 59 55 73 77 66 92 68 75 87 80 70 60 80 77 98 85 75 69 63 69 50 70 90 83 95 10 03 75 92 Use 1% and 5% levels of significance to test the hypothesis that a. The subjects are of equal difficulty. b. The students have equal ability