Ahmad and her family are planning their dream house. The lot for the house sits high on a hill with a beautiful view of the Kuala Lumpur. The plans show the size of the house to be 1000 meter square. The average price for a lot and house similar to this one has been RMBE per mmetge square. The following table 1 is average cost information is available from a local bank that makes loans to local contractors and dispenses progress payments to contractors when specic tasks are veried as complete. Excavation and framing complete 24% Furnace installed 9% Roof and replace complete 8% Plumbing xtures installed 4% Windows, insulation. wall-cs. 17% Exterior paint, light xtures 10% plaster, and garage complete installed. nish hardware installed Wiring roughed in 3% Floors laid and nished 4% Plumbing roughed in 6% Carpet and trim installed 6% Siding on 5% Interior decorating 4% Table 1: Average cost information Based on Table 1: Average cost Information a. Estimate the cost for the Ahmads' house if they use contractors to complete all of the house and prepare the breakdown the estimate cost of all the @115 to assist Ahmad on managing progress payment between bank and contractors. I b. Fortunately, his father is a retired plumber and feels he can save money by installing the plumbing himself. Ahmad feels he can take care of the interior decorating. Estimate what the cost of the house would be if the Ahmad uw their talents to do some of the work themselves