$+y$ axis is directed up$.)$

$($a$)$ If $q_1=-4\mathrm{.}00C$ and $q_2=-4\mathrm{.}00C,$ what is the net electric field due to both charges at location A$?$ Express your answer in vector form. vec$(E{)}_{\text{n}\text{e}\text{t}}=$

$($b$)$ If $q_1=3q_2($where $q_2=-4\mathrm{.}00C),$ what is the net electric field at location A due to both charges? Express your answer in vector form.

vec$(E{)}_{\text{n}\text{e}\text{t}}=$