write my assignment 5084

Please help me solve the problem . I got the asnwer but I want to understand and how to solve this correctly and please be detail , so I can understand this

15 .A rectangle is inscribed with its base on the X-axis and it’s upper corners on theparabola Y = 10 – *` . An example is shown here . In this example , the rectangle extends toabout* = 1 . 3 and* = – 1.3 on the X – axis . It’s dimensions are width = 2.6 , height = 8.3 .The rectangle can change dimensions , as long as its base is on the X- axis and it’s upper cornersare on the parabola . What are the dimensions of such a rectangle with the greatest possible*area ?73- 2- 7?31A. width = 10 / 3 , height = 20 / 3)B . width = 2 , height = 6C . width = 20 / 3 , height = 10 / 3)D .width = 3 / 2 , height = 31 / 4E . None of these