Solve the all parts of given question:
Question: Francisco is trying to fly his vintage 1947 Beach craft V-tail Bonanza from Kankakee to Chicago which is 70 miles due north. The Bonanza can fly at 130 mph in still air. The wind is blowing at 40 mph to the east.
Part A: If Francisco wants to fly directly from Kankakee to Chicago at what angle does he aim his plane (relative to north)?
Part B: What will be the plane's speed relative to the ground?
Part C: How long does the journey take?
Please explain each step and equations used for above question.