There are two graded MATLAB problems to turn in. 1. (5 pts) This is a short problem to illustrate the "nfinite" sheet of charge approximation. a) Write down: (i) the equation for the electric field "" above an infinite sheet with uniform surface charge density (ii) the equation for the electric field "E" at a height h above a circular disk with radius a and uniform surface charge density iii) the ratio E/E, rewritten so that it is in terms of the variable a/h You don't need to derive (i) and (ii), refer to class/book examples. b) Use MATLAB to plot E/E versus a/h. At what value of a/h would you say the infinite sheet is a good approximation