At location $A$ there is an electric field in the direction shown by the orange arrow in Figure $13.56 .$ This electric field is due to charged particles that are not shown in the diagram. (a) If a proton is placed at location $A,$ which of the arrows $(a-h)$ best indicates the direction of the electric force on the proton? (b) If the proton is removed and an electron is placed at location $A$ which of the arrows in Figure 13.56 best indicates the direction of the electric force on the electron?