A large positively charged object with charge $q_{+}=3\mathrm{.}25C$ is brought near a negatively charged plastic ball suspended from a string of negligible mass. The suspended ball has a charge of $q_{-}=-51\mathrm{.}3nC$ and a mass of $14\mathrm{.}5g.$

What is the angle $$ that the string makes with the vertical when the positively charged object is $19\mathrm{.}5cm$ from the $=$ suspended ball?

The positively charged object is at the same height as the suspended ball.