A jogger travels a route that has two parts. The first is involves a displacement that points due east and the second a displacement of 2.90 km due south. The resultant displacement + has a magnitude of 3.90 km. (a) What is the magnitude of , and (b) what is the direction of + as a positive angle relative to due south? Assume that - had a magnitude of 3.90 km. (c) What then would be the magnitude of and (d) what is the direction of - relative to due south?