Repair Time in Hours	Months Since Last Service	Type of Repair	Repair Person
2.9	2	1	1
3.0	6	0	1
4.8	8	1	0
1.8	3	0	1
2.9	2	1	1
4.9	7	1	0
4.2	9	0	0
4.8	8	0	0
4.4	4	1	0
4.5	6	1	1

Use R to solve this regression analysis problem a. Create regression models for the "Repair time in hours" as the dependent variable, and all seven combinations of one or more of the three independent variables - "Months since last service", "Type of repair" and "Repairperson"; which of those models are statistically significant at 0.05 level of significance? b. Which of those regression models would you recommend the company use to estimate repair time? Explain.