Write a function that will take four parameters: omega , x0, phi, and a list of times; and which outputs a list with the value of a harmonic oscillator at those times. i.e. it calculates x0cos(t+) for all the t in the list. The following function rangef that generates a list of values between xmin and xmax might be useful (it's the same one we just met in the def rangef (xmin,xmax,dx) : out =[] steps = int ( round ((xxmaxxmin)/float(dx))) for step in range(steps ) : x= step*dx+xmin out.append (x) return out def harmonic_oscillator (omega, x, phi, times): # write your code here.