Anew home is being designed and a company boasts its new concrete used for basement slabs as being energy efficient and lighter, saving homeowner's money and using less material. the new material is sold in 13 m wide, 17 m long, and 0.4 m thick slabs. concrete on the other hand sells as 0.5 m thick slabs with similar dimensions. during the summer months, temperatures are nominally 20 degree c and 14 degree c at the top and bottom surfaces, respectively. during the winter months, temperatures are nominally 17 degree c and 10 degree c at the top and bottom surfaces, respectively. the new material has a thermal conductivity of 0.08 w/mk and the concrete has a value of 0.13 w/mk. calculate the rate of heat loss through each slab. if the home designed is to be heated by an oil furnace that has an efficiency of eta = 0.88 and current oil prices are s0.10/mj, what is the cost per day of heat in the winter months? if the boiler is also designed for domestic hot water use and needs to fire an average of 3 hours per day in the summer, what is the cost of heat per day for hot water in the summer months? what is the better choice of material to save the homeowner money? ignore any differences in price of material. comment on how the homeowner could reduce their costs even further.