$(1$ point$)$

Assume $n$ is a positive integer. Count the number of operations in the loop below:

$x$:$=9$

$y$:$=2$

$z$:$=-5$

for $j$:$=3to3n$

$x$:$=2*(x+j)-7$

$y$:$=x+z$

$z$:$=n*x+j*y$

next $j$

There are

operations performed in each run of the loop and the loop runs

times, so the total number of operations performed in this loop is