Please answer the 4 questions step by step. Please show all the units. Thank you

1. A uniform electric field causes an electron to slow down from its initial velocity of 4.8 x 103 -i to a final velocity of 2.2 x 103 i over a time interval of 10 ns. What is the electric field (express your answer in unit-vector form)? 2. An electric dipo 2. The point P is between two negative charges, as shown in -Zuc -3uC the diagram. What is the magnitude and direction of the net electric field at P? 4 mm dim- 8 mm1. Three charges are placed on an x-y plane as shown in the diagram. What is the net electric force acting on the -8 nC charge? Express +5 nc your answer in unit-vector form (Fxi + Fyi)? 5 cm -8 nc X 5 cm 5 cm -5 nc e 2. An electric dipole consists of an electron and a proton arranged 3 nm as shown in the diagram at right. There is a uniform electric field E = 150-1. What is the torque acting on the dipole? Express 4 nm your answer in unit-vector form