6. A $10,000, 6% bond with semi-annual coupons is redeemable at par. What is the purchase price to yield 7.5% compounded semi-annually (a) nine years before maturity? (b) fifteen years before maturity? (a) The purchase price is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (b) The purchase price is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) 7. Project A requires an immediate investment of $8000 and another $6000 in three years. Net returns are $4000 after two years, $12,000 after four years, and $8000 after six years. Project B requires an immediate investment of $4000, another $6000 after two years, and $4000 after four years. Net returns are $3400 per year for seven years. Determine the net present value at 10%. Which project is preferable according to the net present value criterion? The net present value of Project A is $ (Round to the nearest dollar as needed.) The net present value of Project B is $ (Round to the nearest dollar as needed.) According to the net present value criterion, project (1) is preferable. (1) A Scr The B On