Silly Putty Incorporated has had sales of $$12$ million, $$17$ million, and $$16$ million for each of the last three years. What would be the MAPE if the actual sales were $$15$ million using the na$$ve approach?

Multiple Choice

$8\mathrm{.}14$ percent

$5\mathrm{.}73$ percent

$6\mathrm{.}67$ percent

$6\mathrm{.}71$ percent