1.4 (20 points) (a) Use a single command to create a row vector (assign it to a variable named b) with 19 elements such that b = 1 2 3 4 5 6 7 8 9 10 9 8 7 6 5 4 3 2 1 1. Use array 2. Use linspace() (b) Create the following matrix by using vector notation for creating vectors with constant spacing and/or the linspace command. Do not type individual elements explicitly. Show the Matlab code and answer. A 0 600 0 5 10 15 20 25 30 500 400 300 200 100 0 0.8333 1.6667 2.5 3.3333 4.1667 5