need expert asap

Crane Communication Corp. is considering an investment in new technologies. The company's management expects significant benefits in the first three years after installation, and smaller constant benefits in each of the next four years. What is the discounted payback period for the project assuming a discount rate of 10 percent? (Round answer to 2 decimal ploces, es. 15.25. If discounted payback period exceeds life of the project, enter ofor the answer) The discounted payback period for the project is years