What is the deviation from the mean for the first month?

Question $2$ options:

$-86$

$-36$

$-37$

$-16$

Question $3(2$ points$)$

What is the sum of the squared deviations?

Question $3$ options:

$2400$

$2284$

$1800$

$3168$

Question $4(2$ points$)$

What is the standard deviation for the $4$ months?

Question $4$ options:

$84$

$15\mathrm{.}1$

$57\mathrm{.}1$

$23\mathrm{.}9$

Question $5(2$ points$)$

If the service level required is $95\%,$ what is the safety stock required?

Question $5$ options:

$25$

$39$

$94$

$201$