There are three brands of computers namely Dell, Lenovo, and HP. The following are the lifetime of 15 computers in years.

Serial Number	Computer Brand	Lifetime in years
1	Dell	15
2	Lenovo	10
3	HP	9
4	Dell	12
5	Lenovo	6
6	HP	7
7	Dell	4
8	Lenovo	8
9	HP	13
10	Dell	11
11	HP	5
12	Lenovo	7
13	Dell	3
14	HP	5
15	Lenovo	4

Apply appropriate statistical tests to identify whether the average lifetime (in years) is significantly different across three rands of computers at a 5% level of significance. You can again tabulate the data initially in the required format for statistical analysis.