Помогите , please!!?? 40 баллов! Complete each sentence by choosing from the following devices: touch screen, trackball, touchpad, webcam. 1 A ..........................inary device that works like a mouse turned upside down. You roll the ball with your hand to move the pointer on the screen. 2 Interactive are used in museums, information centres and Internet kiosks. You use your finger to point directly to objects on the screen. 3 A. is used to send live video images via the Internet. 4 A is found on notebook PCs. You use it by pressing the sensitive pad with a finger.​