You are considering a new product launch. The project will cost $ $1,700,000,$have a four $-$ year life, and have no salvage value; depreciation is straight $-$ line to zero. Sales are projected at $140$units per year; price per unit will be $ $22,000,$variable cost per unit will be $ $12,500,$and fixed costs will be $ $490,000$per year. The required return on the project is $10$percent$,$ and the relevant tax rate is $21$percent$.$ a $-1.$The unit sales, variable cost, and fixed cost projections given above are probably accurate to within $\backslash$ pm $10$percent$.$ What are the upper and lower bounds for these projections? What is the base $-$ case NPV $?$What are the best $-$ case and worst $-$ case scenarios? $($ Do not round intermediate calculations and round your answers to the nearest whole number, e $.$ g $.,32.)$ a $-2.$What is the base $-$ case NPV $?$What are the best $-$ case and worst $-$ case scenarios? $($ A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answers to $2$decimal places, e $.$ g $.,32.16.)$ b $.$Calculate the sensitivity of your base $-$ case NPV to changes in fixed costs. $($ A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to $3$decimal places, e $.$ g $.,32.161.)$ c $.$What is the accounting break $-$ even level of output for this project? $($ Do not round intermediate calculations and round your answer to $2$decimal places, e $.$ g $.,32.16.)$