5 10 cm - -e E 2 cm YA Vo 1 cm Figure 4: sidero 4. (7 Points.) An electron (mass = 9.1 x 10-31 kg and charge q = -1.6 x 10-19 C) enters a uniform electric field E = 2.5 x 103 N/C j with an initial velocity of v. = 4.8 x 10 m/si perpendicular to the field as shown in the above figure. (a) Find the time it takes for the electron to fall to the lower plate. (4 Points) bus (b) At what point does the electron strike the lower plate? Assume the left edge of the plate to be at x = 0 cm. (3 Points.)