1. The problem statement, all variables and given/known data Hi, I'm just seeking an explanation of this solution for question 4 on the following document. https://docs.google.com/viewer?a=v&...Sg3wEk&sig=AHIEtbSrlOPM8RXfN8I7gBoTxzXwVzwddg I'm just wondering how did they just pick out the vectors A, B and C arbitrarily? And I'm more confused about how they parametrized the paths c1, c2 and c3. Why choose (1-λ)?