Consider the following pseudocode segment.

$x+3$

for iin$\{1,2,$dots,$n\}do$

$r.$ for jin$\{1,2,$dots,$n\}do$

xlarrx$+5$

for kin$\{1,2,3,4,5\}do$

llcorner

$x+x+k+1$

$($a$)$ How many times is the $"+"-$operation executed?

$($b$)$ What is the value of $x$ after this segment runs?

$x=$