Solution:  Refer the attached screenshot for anwers  Part A )  IRR is calculated for both the project and it is 25.66% for A and 57.91% for Project B  Part B )  In order to find the interest rate that makes the NPV or present worth of these project same, we have to find the NPV at different interest rates and then plot the graph and crossover point will be that rate.&# ... See the full answer