Two point charges are located on a coordinate system as follows: Q1, = ‒4.5 μC at x = 1.00...

Two point charges are located on a coordinate system as follows: Q1, = ‒4.5 μC at x = 1.00 cm and y = 1.00 cm and Q2, = 6.0 μC at x = 3.00 cm and y = 1.00 cm. (a) What is the electric field at point P located at x = 1.00 cm and y= 4.00 cm? (b) When a 5.0-g tiny particle with a charge of ‒2.0 μC is placed at point P and released, what is its initial acceleration?