DELETE operation is applied to a BST of height k. What are the maximal and minimal numbers of calls of DELETEMIN, which may occur during execution? Justify your answer.

function DELETEMIN var A: SET): elementtype; var minimum: integer, begin ifAT.lefichild = nil then begin minimum := A1.element; A:= At.rightchild; return (minimum) end else begin minimum := DELETEMINAMIeftchild); return (minimum) end end