Sunland 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 places, e$.$g$.$

$15\mathrm{.}25.$ If discounted payback period exceeds life of the project, enter $0$ for the answer.$)$