FINANCE-The LowTec Corporation is about to begin producing and selling its prototype product

Question
The Low Tec Corporation is about to begin producing and selling its prototype product. Annual cash flows for the next five years are forcasted as: 1 ($50,000) 2 ($20,000) 3 $100,000 4 $400,000 5 $800,000 Investors in LowTec have an expected rate of return of 30 percent on their investment until year 5, when the rate of return is expected to drop to 18%. The perpetuity growth rate for cash flows after Year 6 is expected to be 7 percent. Determine the present value for the LowTec venture.

Please show and explainall work.