the command used to display the current workkng foldee in octave is

2. (16%) An array (vector) u will be used to store all values starting from sin(-pi) to sin(pi) 2 with an increment of 0.5 a) How many elements are stored in u? b) Use the Octave linspace command to create u? c) What Octave function/command you can use to determine the magnitude of the vector u? d) Determine the magnitude of u by hand