MAT491 : CALCULUS IIIODL March–July 2020\namn2020TOPIC : MAXIMA AND MINIMA OF FUNCTIONS OF TWO VARIABLESPlease fill in the blank for all question to helps you understand the topic.InstructionRevision : Calculus ICalculus IIIQuestionFind all the relative extrema points of±²5335fxxx³.Find all the relative extrema points of± ²22328fxxxyyy³´³.Solution (Second Derivative Test)Find 1st orderderivative.Find the critical points.Find 2nd order