What is the strength of the electric field at the position

Question

Suppose Q₁ = 3.0nC and Q₂ = 6nC

Part A

What is the strength of the electric field at the position indicated by the dot in (Figure 1)?

Part B

What is the direction of the electric field at the position indicated by the dot in (Figure 1)? Specify the direction as an angle measured counterclockwise from the positive x axis