Please answer these 3 questions and explain all the steps with units. Thank you!

V 1. An electron at x = 0 is given an initial velocity of 4 x 10'm/s pointing in the positive x direction. What is 40 the electron's velocity when it reaches x = 5m? 30 20 10 0 x (m) 1 2 3 4 53. Three charges are fixed in place on an x-y plane as shown in the FIND @ diagram. A proton is released from rest at the origin. What is the x20, x25cm -5 nc proton's speed when it reaches x = +5cm? w2 S +10 nc X 5 cm 5 cm -5 nC2. A line of charge with length L = 5 m lies along the x- axis with its left end at x = 0. The linear charge density depends on position as 1 = ax2, where a = 2MC/m3. X What is the electric potential at x = 0? X = 0