A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts $($a$)$ through $($c$)$ below.

$\stackrel{}{x}=23,n=35,=3,$ confidence level $=95\%$

Click here to view page $1$ of the standard normal distribution table.

Click here to view page $2$ of the standard normal distribution table.

b$.$ Obtain the margin of error by taking half the length of the confidence interval.

What is the margin of error obtained by taking half the length of the confidence interval?

$E=\frac{\text{c}\text{o}\text{n}\text{f}\text{i}\text{d}\text{e}\text{n}\text{c}\text{e}\text{i}\text{n}\text{t}\text{e}\text{r}\text{v}\text{a}\text{l}\text{l}\text{e}\text{n}\text{g}\text{t}\text{h}}{2}=2$

$($Type an integer or decimal rounded to one decimal place as needed.$)$

c$.$ Obtain the margin of error by using the formula $E=z_{\frac{}{2}}*\frac{}{\sqrt[\phantom{2}]{n}}.$

Identify the $z-$score.

$z_{\frac{}{2}}=($Type an integer or decimal rounded to two decimal places as needed.$)$

What is the margin of error obtained by using the formula?

$E=z_{\frac{}{2}}*\frac{}{\sqrt[\phantom{2}]{n}}=,($Type an integer or decimal rounded to one decimal place as needed.$)$

NEED B AND C PLEASE