a company is deciding between two mutually exclusive projects. the cash flows are shown below. year $0$ project a $-$$$1,000$ project b $-$$$1,000$ ywar $1$ project a $550$ project b $400$ year $2$ project a $550$ projecy b $600$ year $3$ project a $550$ project b $900$ if the cosy of capital is $10\%$ which project should the compsny select