Assignment:
Q1. Given a = <4, -3, -1> and b = <1, 4, 6>, find a X b.
Q2. Find the arc length of the curve given by x = cos 3t, y = sin 3t, z = 4t, from t = 0 to t = pi/2.
Provide complete and step by step solution for the question and show calculations and use formulas.