[Solved] Which of the following is a reasonable estimate for the total surface area of all the seats in a football stadium that seats 100,000 spectators? Consider only the horizontal portion of the seats (the part that people actually sit on). A) 1 × 10<sup>3</sup> m<sup>2</sup> B) 2 × 10<sup>6</sup> m<sup>2</sup> C) 5 × 10<sup>2</sup> m<sup>2</sup> D) 1 × 10<sup>4</sup> m<sup>2</sup> E) 2 × 10<sup>5</sup> m<sup>2</sup> Stage and Light Source: Key components of a microscope that support the specimen and provide necessary illumination for viewing. Objective and Ocular Lenses: Components of a microscope, where the objective lens is close to the object being observed for magnification, and the ocular lens or eyepiece is what the viewer looks through at the magnified image. Upside Down: Oriented in the opposite direction to the usual, with the top or upper part turned toward the bottom. Naked Eye: Refers to the observation of objects without the use of magnification instruments.