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i have to make a diagram or chart of a few of these sequences that shows the relationship between the electric fields using rays and pointing towards or from the charge in each of the problems

How do I draw the electric field for this? Draw the electric field for a positive and negative point charge positioned 5 cm from each other. Do the same for two negative charges the same distance apart and finally two positive charges the same distance apart.

i don't know how to draw the picture

Homework Statement Draw the ray diagrams for a pencil sitting on the principal axis behind and in front of the focal point of a converging lens. Describe the image. Do the same for a pencil sitting on the parallel axis behind and in front of the focal point of a diverging lens.