Please solve these 2 question in details and explaination. I know the answer but not sure how to do.

3. A particle moves along a space curve ( with velocity, i and acceleration a. I v = T+ atj tat'k and vxa = 41"T- 4+5 + 2k, find: 1 ) The principal unit normal N at t= 1. it ) The torsion T at t= 1. Answer : 1) N = - 3 7 + ( -16 J ) + ( 4 3 * ) 4. Africtionless Load turn in circular with radius 78 meties is designed to have a maximum speed of 54 km/hr . What is the banking angle of the huin to the nearest degree? Answer: 16