Answer
Add a $9.0 \mu F$ capacitor in parallel.
Work Step by Step
When capacitors are wired in parallel, we use equation 19–5 to find the equivalent capacitance.
$$C_{eq}=16.0\times10^{-6}F = 7.0\times10^{-6}F+ C$$
$$C=9.0\times10^{-6}F$$
The technician should solder a $9.0 \mu F$ capacitor in parallel with the original $7.0 \mu F$ capacitor to correct the situation.
