This program provides practice for writing programs to perform more complex numerical calculations, and specifically to give you practice with vector calculations. For this exercise you just need to use: input, variables, print and import math library. Write a program that calculates the angle between two points, as seen by an observer. Your program should ask the user the following data from the keyboard (input): - The 3D position of an observer. (i.e. XO, YO, 20) - The 3D position of the first observed point - The 3D position of the second observed point The program should calculate and output, in degrees, the angle between the points from the observer's perspective. Point 1 Vector 1 Point 2 Vector 2 Observer