given the following points,use the desmos calculator to find their equation in vertex form. y=a(x-h)^2+k. 1.(4,-2),(0,6), (6,0). 2. (-6,1),(-9,4), (-3,4). 3. (-3,0),(3,6), (9,0). 4.(-6,0),(-4,3), (2,0).