(d) We will now perform a sensitivity analysis by recalculating the NPV by changing the value of one variable at a time. Consider the following base, low and high values for each of the input variables listed below. Base value Low value High value Unit price $6.50 $6.00 $7.00 Annual unit sales 52,000 50,000 55,000 Variable cost per unit $1.75 $1.50 $2.00 Expected salvage value $45,000 $30,000 $60,000 Tax rate 35 percent 30 percent 40 percent Required rate of return 11 percent 10 percent 13 percent Fill out the table below by recalculating the NPV under each individual change. Project NPV Variable With low estimate With high estimate Range of estimates Unit price Annual unit sales Variable cost per unit Expected salvage value Tax rate Required rate of return (e) Which of the variables has the most effect on NPV? How do you explain it