1.Foci of ellipse x2/25+y2/16=1x^2/25+y^2/16=1x2/25+y2/16=1 and hyperbola x2/4−y2/b2=1x^2/4-y^2/b^2=1x2/4−y2/b2=1 coincide. b2=b^2 =b2=a.444b.555c.888d.999Login to continueOnly logged in users canattempt or see the solution.