exam Maths Puzzle Numerical Ability

Find the equation of an ellipse with center at the origin, a vertical major axis of length 8, and a horizontal minor axis of length 4.

Could someone help please?

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exam Other Question
Write an algebraic expression for 4 more than 1/3. 8. Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo?
A) 8
B) 10
C) 12
D) 14