What is the payback period for the following set of cash flows?

Year Cash Flow

$0$$ $3,700$

$11,400$

$22,000$

$32,900$

$42,200$

Options: $2\mathrm{.}40$ years, $2\mathrm{.}21$ years, $2\mathrm{.}05$ years, $2\mathrm{.}12$ years, $2\mathrm{.}10$ years