Please help me solve the following problems. Show details and illustrations. Thank you! * A window is in the form of an equilateral triangle surmounted on a rectangle. The rectangle is of clear glass...

Please help me solve the following problems. Show details and illustrations. Thank you!

* A window is in the form of an equilateral triangle surmounted on a rectangle. The rectangle is of clear glass and transmit twice as much light as does the triangle which is made of stained glass. If the entire window has a perimeter of 20 feet, find the dimensions of the window that will admit the most light.