Question 1032862
Here, a = 5, c = 3, and b is unknown.

==> {{{a^2 = b^2 + c^2}}} for an ellipse  ==> {{{25 = b^2 + 9}}} ==> {{{b^2 = 16}}}.

The equation of the ellipse would be {{{x^2/b^2 + y^2/a^2 = 1}}}, since the major axis is along the y-axis.

==> the equation of the ellipse is {{{x^2/16 + y^2/25 = 1}}}.