shown below are three point charge arranged in the shape of an equilateral triangle.the triangle has a side of $20$cm$,$an and point P is located at the midpoint of the bottom side.All three charges have the same magnitude of charge $(5$x$10^-6$C$),$but two of them are positive and one is negative.

a$)$ what is the magnitude of the net electric field at point P$?$Shown below are three point charges arranged in the shape of an equilateral triangle. The triangle has a side length of $20cm,$ and point $P$ is located at the midpoint of the bottom side. All three charges have the same magnitude of charge $(5\mathrm{.}0C),$ but two of them are positive and one is negative.

b$)$ what is the precise direction of the menet electric field at point P$?$