PC Shopping Network may upgrade its modem pool. It last upgraded $2$ years ago, when it spent $$90$ million on equipment with an assumed life of $5$ years and an assumed salvage value of $$30$ million for tax purposes. The firm uses straight$-$line depreciation. The old equipment can be sold today for $$90$ million. A new modem pool can be installed today for $$180$ million. This will have a $3-$year life and will be depreciated to zero usinf straight$-$line depreciation. The new equipment will enable the firm to increase sales by $$29$ million per year and decrease operating costs by $$12$ million per year.At the end of $3$ years the new equipment will be worthless. Assume the firm's tax rate is $30\%,$ and the discount rate for the projects of the sort is $14\%.$ A$.$ What si the net cash flow at the time $0$ if the old equipment is replacced? B$.$ Waht are the incermental cash flows in years; $1,2,3$ C$.$ What is the NPV of the replacement project? D$.$ What is the IRR of the replacement project?