i) Define Fitts Law and explain how it applies to user interface design. Now, apply your knowledge of this law to the below figure and indicate giving reasons which target you think is fastest to reach with the mouse starting at location M. Assume that you can move your hand equally well in all directions, and that none of the targets are near a screen edge. Include all calculations in your answer.(Consider Performance Index (Ip) as 4.35 bits/msec and y-intercept as 350).

ii) Prepare an NGOMSL description for finding a four-letter word Rear and replace it with Near in the given word document. Describe all the steps associated with the set of goals formed to complete the task. Use the following information to compute the total predicted time for task completion [ Given that Keystroke-0.28 sec, Pointing-1.1 sec, Mouse click ( Press +release)-0.2 sec, Homing-0.36 sec and Mental preparation 1.2 sec]

Target Target 16 10 Target A 5 20 10 Target