Sharon tried to solve an equation step by step.
\qquad\begin{aligned} 9& =-3(e-2) \\ 9& =-3e+6& \green{\text{step } 1} \\ 15& =3e& \blue{\text{step } 2} \\ 5& =e& \purple{\text{step } 3} \end{aligned}
9
9
15
5


=−3(e−2)
=−3e+6
=3e
=e


step 1
step 2
step 3


find sharon's mistake.

The thickness of photoresist applied to wafers in semiconductor manufacturing at a particular location on the wafer is uniformly distributed between 0.2070 and 0.2171 micrometers.(a) determine the proportion of wafers that exceeds 0.2125 micrometers of photoresist thickness. (round your answer to 3 decimal places.)enter your answer in accordance to the item a) of the question statement(b) determine the mean of x. (round your answer to 4 decimal places.)enter your answer in accordance to the item b) of the question statement micrometers(c) determine the variance of x. (round your answer to 8 decimal places.)enter your answer in accordance to the item c) of the question statement micrometers2