PLEASE HELP ME BY ANSWERING THID QUESTION

Q4 Table 4 indicates various cost associated with two different water pump brands. Table 4: Various cost for the two pumps. Description Hitachi Puma Initial cost (RM) 4,100 10,500 Rebuilt cost (RM) 1,100 2,400 Time before rebuild, annually or minimum hours 2,100 8,600 Cost to operate, RM per hour 1.00 0.90 Life, years 3 6 (a) Determine the minimum number of hours per year to operate the pumps that will justify the Puma pump using Annual Worth method with interest rate of 10% annually. (b) Decide which pump is economically better if it operates 7 hours per day, 365 days per year