$6.(6$ pts$)$ When a force of $19$ N is applied to a spri it elongates $17\mathrm{.}5$ cm$.$ Determine the period oscillation of a $4\mathrm{.}0-$kg object suspended from spring.a$.0\mathrm{.}84$ sb$.1\mathrm{.}2$ sc$.3\mathrm{.}1$ sd$.4\mathrm{.}1$ se$.6\mathrm{.}3$ s