A Company is considering the following investment projects:

a$)$ Rank the project in according to each of the following methods:

i$.$ Payback

ii$.$ ARR

iii. NPV

iv$.\frac{?}{PI}$

Assume that discount rates are $10\%$ and $30\%$

b$)$ Assuming the projects are independent, which one should be accepted? If the

projects are mutually exclusive, which project is the best?