Define the following column arrays in MATLAB: a = Then issue the following commands: a' a*b' a' b a. b What do each of these three operators do? Exercise 2: Perform the following operation: a b What is the error message? What does the message mean? What is the correct fix? Exercise 3: (3) and b=(1) Perform the following: c=a+b d=a+b; What does the do? 3.* b