Following are the flows of two projects that took place at the end of the year. It is assumed that the company will use a 10% Weighted Average Cost of Capital (WACC):

The project name	Year 0	Year 1	Year 2	Year 3
A	IDR 2100	IDR 1500	IDR 900	IDR 300
B	IDR 2100	IDR 300	IDR 900	IDR 1800

Questions

What is Project A's Internal Rate of Return (IRR)?

What is the Internal Rate of Return (IRR) for Project B?

How long is the return period for project A?

How long is the return period for project B?