A jogger travels a route that has two parts. The first is a displacement A of 2.15 km due south, and the second involves a displacement I that points due east. The resultant displacement A + B has a magnitude of 3,90 km. (a) What is the magnitude of #, and (b) what is the direction of A + # as a positive angle relative to due south? Suppose that A - # had a magnitude of 3.90 km. (c) What then would be the magnitude of B, and (d) what is the direction of A - # relative to due south? (a) Number 1.32 Units (b) Number Units (c) Number Units (d) Number Units eTextbook and Martin