please provide me the manually calculation for answering the question. thank you

a. Three brands of batteries are to be compared by testing each brand in a standard experiment of motion. Fifteen batteries are randomly selected to be used and the lifetimes of the batteries, to the nearest hour, are as follows: Brand Battery Performance (in hours) A 8 10 9 11 10 B 8 9 9 8 10 C 10 9 10 11 9 i. Construct the ANOVA table. (13 marks) ii. At the 5% significance level, determine whether there appear to be a difference in mean lifetime among the three brands of batteries. (7 marks)