1) Four charges are placed on the corners of a rectangle. 1)What is the resultant force on the positive charge (a = 1.1

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1)
Four charges are placed on the corners of a rectangle. 1)What isthe resultant force on the positive charge (a = 1.1 m, b = 0.8 m, q= 2.1 x 10-9C)?
|F| = _____ N
2)
A charge Q1 = -2.1 x 10-9 C isat the origin and a charge Q2 = 9.2 x10-9 C is on the x-axis at x = 3 m.
At what location on the x-axis is the electric field zero?
x = _____ m