solve all if the following please

4. Calculate the electric field intensity at a point that is 10cm inwards from one charge of 4.2X10"C and the other of 6.2X10 *C if the two charges are 25 cm apart. (3) 5. An electron is accelerated from an initial velocity of 2.3X10 m/s between two parallel plates that are 4.5cm apart from each other. The voltage between the plates has been set at 22V. Determine the speed of the electron when it reaches the positive plate, assuming it is released from the negative plate. (4) Bonus: In the diagram on the left, d=3.7mm and Q are two charged particles with the same charge of 8.9X10*C. Determine the electric field at the point P. (Only write the answer, you do not need to show work.) (1) 50 50 +Q +0