This is a multi-part problem. That means the parts must be worked in order (a first, then b, then c, and so on). Check your answer on part a and rework if necessary before going on to part b. You will not be allowed to change your answer on part a after going to part b. Let X = 7 40 and Y = 20 -30. The polar form of the quantity (X + Y)X* is . Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees