1. The problem statement, all variables and given/known data A 5.0 μC point charge is located at x = 1.0 m, y = 3.0 m, and a −4.0 μC point charge is located at x = 2.0 m, y = −2.0 m. a) Find the magnitude and direction of the electric field at x = −3.0 m, y = 1.0 m. [5 Marks] b) Find the magnitude and direction of the force on a proton at this position in a). 2. Relevant equations E = (kq/r²) x [r-hat] (couldn't find the symbol for r circumflex) 3. The attempt at a solution I can work out the first part of the equation, but I'm unsure what r-hat represents and what figure to use. I thought a unit vector was in the form Ai + Bj + Ck, how do you multiply that by a figure to get another single figure?