Please help me to solve this with a brief explanation. Use R if necessary. Thanks!

Helicopter service. An operations analyst in a sheriffs department studied how frequently their emergency helicopter was used during the past year. by time of dag; {shift 1: 3 AM. 8 AM; shift 3: 8. AM. E P.M.; shift 5: .2. PM. S P.M.; shirt 4: 3. PM. E. A.I\\-".[.:}- Random samples or size 20 for each shift 1were obtained. The data follow {in time order): Since the data are counts. the analyst was concerned about. the normality and equal variances Assumptions" or ANDREA. rnedel a) Obtain the fitted values and residuals for ANOVA model {:lr'.'_' " Prepare suitable residual plots to study hether or not the error variances are equal for the four shifts. What are your findings? Test by; means of the Bren-'n-Forsythe test whether or net the treatment. error variances are equal: use ::-:: = 10. What is the P-value of the test'?' Are your results consistent with the diagnosis in part :: Use the Box-Cox procedure to find an appropriate power tnlllsferrnation of I? first adding the constant I to each I\" ::.~bsen'lltion_ Evaluate .S'SE for the values of A given in Table 18.6.. Docs rs = 5. a squareroot transformation. appear to be reasonable. based on the Box-Con procedure