1. Describe Fitts’ law (see Fitts' law states that the amount oftime required for a person to move a pointer (e.g., mouse cursor)to a target area is a function of the distance to the targetdivided by the size of the target. Thus, the longer the distanceand the smaller the target's size, the longer it takes.). How doesFitts’ law change for different physical selection devices, such asa three-button mouse, a touchpad, or a pen/stylus? (You’ll need todo some internet research for this.) don’t use vikipedi. When youexplain give full calculation and picture about mouse cursor, threebutton mouse, a touchpad or a pen/stylus. (don’t explainirrelevant definition only related topics)

2. Pick a couple of computer input devices that you are aware of(joystick, light pen, touchscreen, trackball, eyegaze, dataglove, )and note down how each has different attributes that supportcertain forms of interaction. You ought to know a little about allof these devices – if you don’t, research them on internet. Don’tuse Wikipedia as a research.

3. Individually or in a group find as many different examples asyou can of physical controls and displays.

(a) List them.

(b) Try to group them, or classifythem.

(c) Discuss whether you believe thecontrol or display is suitable for its purpose.

4. A typical computer system comprises a QWERTY keyboard, a mouseand a color screen. There is usually some form of loudspeaker aswell. You should know how the keyboard, mouse and screen work – ifnot, read up on it.

What sort of input does the keyboardsupport? What sort of input does the mouse support?

Are these adequate for all possibleapplications? If not, to which areas are they most suited?

Do these areas map well onto thetypical requirements for users of computer systems?

If you were designing a keyboard for amodern computer, and you wanted to produce a faster, easier-to-uselayout, what information would you need to know and how would thatinfluence the design?