Question $1($a$)$ Calculate the NPV of a project with the following cash flows using discount rates of r $=5\%,$ r $=10\%$ and r $=15\%,$ respectively: Co $=-7,200,$ G $=5,300,$ C$2=8,000.$ State your solutions to the nearest dollar. $($b$)$ Calculate the positive IRR$($S$)$ for this project to the nearest percent.