Which equation represents the transformation of the graph of y = cos(a ) that has been (a) reflected over the y-axis, (b) reflected over the x-axis, and (c) shifted left by 2 units? Oy = - cos(a + 2) Oy = cos(ac + 2) Oy = - cos(a - 2) Oy = cos(ac - 2) Oy =1 - cos(a + 2) Oy = 1 + cos(ac + 2) Oy =1 - cos(x - 2) Oy = 1 + cos(x - 2)