📚 How to write an equation for an ellipse whose center is at the origin

Q. Write the equation of an ellipse with center at the origin (0, 0), whose major axis is 12 units long on the y-axis and whose minor axis is 10 units.

Standard equation of an ellipse (center at origin, major vertex vertical): (y^2/a^2 +x^2/b^2 =1 a GREAT THAN b)