A jogger travels a route that has two parts. The first is a displacement of 1.90 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 4.70 km. (a) What is the magnitude of , and (b) what is the direction of + as a positive angle relative to due south? Suppose that - had a magnitude of 4.70 km. (c) What then would be the magnitude of , and (d) what is the direction of - relative to due south?