Problem 1 Let's suppose our space is occupied by two infinite sheets of positive and negative charge. Let's say we can assume they have respectively uniform density of charge +0 and -o. Now we studied the case when the two planes were parallel to each other. This time they intersect at right angles. What are the magnitude and direction of the electric field? Also, sketch the lines of the field. Problem 4 In the field produced in problem 1, what is the work that needs to be done if we want to bring a particle of q = 10'12C from infinity to the center of the charge distribution