a$.$ Determine in at z $=0,2,4,6,8,$ and $10$ cm$.$ Must be an array called E$\_$a$.$ Hint:

b$.$ Determine the distance z where E$\_$b is maximum. Do it by creating a vector z with elements ranging from $2$ cm to $6$ cm and spacing of $0\mathrm{.}01$ cm$.$ Calculate E$\_$b for each value of z and then find the maximum E$\_$b and associated z with MATLAB$$s built in function max. You should store the value of the maximum in a variable called maxE$\_$b and the index of where that occurs in a variable indx