Which two quotations provide sufficient and relevant evidence to support the author's claim in paragraph 4? "The Cybathlon arena is as different as its events. Yes, there is a racetrack around the floor, and seating along the outside for fans, but most of the action takes place along four parallel tracks in the center, each with rows of obstacles." (paragraph 7) "Many people can make their own breakfast, open doors while carrying bags, or get up from a deep sofa. These conton tasks can be big hurdles, however, for people with prosthetic arms or legs, or those who use wheelchairs." (paragraph 8) "Through daily training, Kurs was able to transition from a wheelchair to leg braces and recently, to an exoskeleton. Now she is a pilot in the Powered Exoskeleton Race. The exoskeleton event involves most of the same tasks as the leg race" (paragraph 16) Wheelchairs are one of the world's oldest assistive technologies, and they can still do a lot to restore personal mobility. if the ground is flat Navigating uneven pavement, riding over ramps, and traveling up and down stairs are still huge challenges for wheelchair users - (paragraph 17) "Functional electrical stimulation (FES) is a way to move paralyzed muscles. When an electrical current flows through electrodes on the skin, the muscles contract. By applying the current in certain patterns, FES can help people who are paralyzed to grasp. stand, and even walk." (paragraph 19)