A. In a series of semi-annual payments of P14465 each, the first payment is due at the beginning of 5 years and the last at the end of 12 years and 6 months. If money is worth 11% compounded semi-annually, find the present value of the deferred annuity.

B. The cost of equipment is P582277 and the cost of installation is P27253, if the salvage value is 10% of the cost of the equipment at the end of 8 years , determine the depreciation change at the end of year 4 using double-declining balance method.