1} Four point charges lie along the 1' axis in our problem. They are: +l,u:C at .r = 0.3 m 1,uC at a: = 0.1 m 1,uC at I = +0.11}: +lJLC at .r = +0.3 m a} What is the value of the x component of the electric eld at points aJong the y axis? b} What is the electric potential along the y axis? (taking, as usual, the zero for potential at innity.) e) Write the expression the work done in bringing this array together. You don't need to simplify the sum after writing it out: but you need to write out each term with relevant values and constants. (HINT: Note that there are air terms in the sum you need to do.) d} How does the potential approach zero in the limit as 3; goes to innity? [That is: what functional forn'L} .Instif'}r why this is different than the form for a point charge, or even the \"dipole\" example done in clam