Question number 11. Find o given that ||a i + (a - 1)j + (@ + 1)kl| = 8. 62 V186 31 4V 186 05 | 00 62 P a = V186 051 03 Question number 12. Find the vector of norm 2 in the direction of 5i + 3j - 5k. 20 12 20 - i . -k 59 59 LO K 1/59 59 59 5 3 5 -1 4 . K V 59 V59 V 59 O 5; 4 101 + 6j - 10kQuestion number 9. Find o given that 5i + 7j - 7k and oi - 14j + 14k are parallel. 0 a =-5 0 a = 10 0 a=-1 0 a = 5 0 a= -10 Question number 10. Find o given that 4i + 4j and o j - 3k have the same length. 0 a = 7 0a=4 0a = {-7,7} O a = V23 Oa = {v23, -V23}