use this calculator print out to answer the questions

$($

$1$

$3$

$.$

$0$

$4$

$6$

$,$

$2$

$2$

$.$

$1$

$5$

$)$

$$x

$=$

$1$

$7$

$.$

$5$

$9$

$8$

$$sx

$=$

$1$

$6$

$.$

$0$

$1$

$7$

$1$

$2$

$7$

$1$

$9$

$$

$=$

$5$

$0$

identify the best point estimate of u and the margin of error