Q$\mathrm{.}4)$ Find the acceleration due to gravity $($g$)$ from the following data? $($sec$)$

Q$\mathrm{.}4)$ Find the acceleration due to gravity $($g$)$ from the following data?

$\backslash$table$[[y(cm),t_1(sec),t_2(sec),t_3(sec),\frac{?}{\text{b}\text{a}\text{r}}(t)(sec),\frac{?}{\text{b}\text{a}\text{r}}(t{)}^2(se{c}^2)0\mathrm{.}146$ y $($cm$)$ t $2($sec$)$ tz $($sec$)$ ts $($sec$)$ E$($sec$)200\mathrm{.}1450\mathrm{.}1440\mathrm{.}1900\mathrm{.}1920\mathrm{.}18730$ The error in g $(\%$ error$)$