-English Version- Q4 Table 4 indicates various cost associated with two different water pump brands. Table 4: Various cost for the two pumps. Description Hitachi Initial cost (RM) Rebuilt cost (RM) Time before rebuild, annually or minimum hours Cost to operate, RM per hour Life, years 4,100 1,100 2,100 1.00 3 Puma 10,500 2,400 8,600 0.90 6 SULIT (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. (16 marks) (b) Decide which pump is economically better if it operates 7 hours per day, 365 days per year. (9 marks)