help me please to solve this case

The palestinien investment fund intend to invest in us. The project require an investment of $50 m this year, & Fm next year. The cash flow from the project is s3 shown in the table Cash cash aut flow ind 50 30 20 30 orom Junoon LO you need to solve this questcon twice 1. assume the rate ji: 10%, const 2. The rate is not constant ej, ; : 6. for the 1st 4 years and then ,,:81 after that' should the palestinien fund recept the project