Please po need Ko na po ngayon

Activity 2: You can do this Express each equation of the ellipse in standard form then give the coordinates of the center, foci, vertices, and covertices of the ellipse.

a. 3x2 + 7y2 - 12x – 28y + 19 = 0
b. 16x2 + 25y2 + 32x - 150y - 159 = 0
c. x2 + 3y2 + 4x + 6y + 1 = 0​