1. Givena=[2,10] and b=[8,23], find:
   1. 3a2b
   2. ab
   3. a+b
   4. projba
   5. The angle betweena andb
2. Givenp=[1,4,8] and q=[10,10,9], find:
   1. 2p+5q
   2. pq
   3. qp
   4. pq
   5. The angle betweenp andq
   6. projqp