How to solve physics regents question on electric fields?

?EMiLY?

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A 5.7 ?C point charge is on the x-axis at x = 2.5 m, and a 4.1 ?C point charge is on the x-axis at x= 2.5 m.
The Coulomb constant is 8.98755 ×10^9 Nm2/C2.

a) Determine the magnitude of the net electric field at the point on the y-axis where y = 1 m.
Answer in units of N/C.

b)Determine the direction of this electric field (as an angle between -180o and 180o measured from the positive x-axis, with counter-clockwise positive.)
Answer in units of o.

Show all steps please. thank you
 
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