Compute all parts of given question:
Question: A long horizontal wire carries 22.0A of current due north. The Earth's field 25.0cm due west of the wire points north but downward, 42 degree below the horizontal, and has magnitude of 5.0×105 T.
Part A: What is the magnitude of the net magnetic field 25.0cm due west of the wire?
Part B: What is the angle below the horizontal of the net magnetic field 25.0cm due west of the wire?
Please show all work and clearly explain each step.