The correct answer is given. Kindly show complete steps so I can understand how to solve these problems. Thank

A small heat pump, including the duct system, now costs $2,400 to purchase and install. It has a useful life of 18 years and incurs annual maintenance expenses of $125 per year in real (year-zero) dollars over its useful life. A compressor replacement is required at the end of years 6 and 12 at a cost of $600 each in real dollars. The annual cost of electricity for the heat pump is $680 in year-zero dollars. Electricity prices are projected to increase at an annual rate of 8%. All other costs are expected to increase at 5%, which is the projected general price inflation rate. The firm's MARR, which includes an allowance for general price inflation, is 15% per year (im). No market value is expected from the heat pump at the end of the 18 years of service life Click the icon to view the interest and annuity table for discrete compounding when i 5% per year. Click the icon to view the interest and annuity table for discrete compounding when i 8% per year a. What is the PW of owning and operating the heat pump? The PW is $ 11110. (Round to the nearest dollar.) b. (i) What is the AW, expressed in actual dollars, of owning and operating the heat pump? The AW is $ 1,813. (Round to the nearest dollar.) (ii) What is the AW in real dollars of owning and operating the heat pump? The AW is $1,314. (Round to the nearest dollar.)