The owner of Kat Motel wants to develop a time standard for the task of cleaning a cat cage. In a preliminary study, she observed one of her employees perform this task six times, with the following results:

OBSERVATION

$1$

$2$

$3$

$4$

$5$

$6$

TIME $($SECONDS$)$

$99$

$87$

$90$

$81$

$93$

$90$

What is the normal time $($NT$)$ for this task if the employee worked at a fifty percent faster pace than the average?

Question $5$ options:

$80$ seconds

$90$ seconds

$60$ seconds

$135$ seconds