The diagram below shows two point charges, A & B$.$ The charge of A is $-6nC$& the charge of $B$ is $-3\mathrm{.}2nC.$ Determine the magnitude & direction of the net $E-$field at point $P.$ The distance between $A$&$P$ is $0\mathrm{.}24m$ & the distance between $B$ & $P$ is $0\mathrm{.}61m.$

Part B: Location of zero E$-$field

Two point charges, A & B $)=-22C$&$q_B=(50C,$ are separated by $14cm.$ The electric field at point $P($see below$)$ is zero. How far from $A$ is $P?$