Complete parts a through c below Find two unit vectors paral
     Complete parts (a) through (c) below.  Find two unit vectors parallel to v = 6i - 8j.  Find b if v=  1/3, b  is a unit vector.  Find all values of a such that w = ai + a/4j is a unit vector.  The parallel unit vector with the same direction is  .  The parallel unit vector with the opposite direction is  .  b=  .  (Type exact answers, using radicals as needed. Use a comma to separate answers as needed.)  a =  (Type exact answers, using radicals as needed. Use a comma to separate answers as needed.) 
  
  Solution
<6/10 , -8/10> , <-6/10,8/10> b = +/- 2sqrt[2]/3 a = +/- 2/sqrt[5]
