A project with an initial investment of $$500,000$ has the following CF$\text{'}$s for seven years:

Year $1$: $$100,000$

Year $2$: $$100,000$

Year $3$: $$100,000$

Year $4$: $$100,000$

Year $5$: $100,000$

Year $6$: $$100,000$

Year $7$: $$100,000$

Assuming an interest rate of $4\%,$ what is the discounted payback period of this project?

A$.5\mathrm{.}00$ years

B$.5\mathrm{.}25$ years

C$.6\mathrm{.}00$ years

D$.5\mathrm{.}55$ years