Experienced students may serve as mentors if they are at least age 21 and have at least 3 years of post-secondary education. In cell L2, enter a formula using the IF and AND functions as follows to determine if Kay Colbert is eligible to serve as a mentor: The IF function should determine if the student's age is greater than or equal to 21 AND the student's post-secondary years are greater than or equal to 3, and should return the text Yes if a student meets both of those criteria or the text No if a student meets none or only one of those criteria. Fill the formula into the range L3:L31, if necessary.

Consider a slotted aloha system, where the time slot equals the fixed duration of each packet. assume that there are 4 stations a,b,c,d sharing the medium. (a) stations a,b,c,d receive one packet each from higher layers at times 1.3, 1.5, 2.6,5.7 respectively. show which transmissions take place when, according to the slottedaloha protocol; describe all transmissions until all four packets have been successful.when needed, each station has access to the following sequence of random number, provided by a random number generator and drawn uniformly between 0 and 1: (1) station a draws numbers: 0.31, 0.27, 0.78, 0.9, 0.9, 0.11, 0. (2) station b draws numbers: 0.45, 0.28, 0.11, 0.83, 0.37, 0.22, 0. (3)station c draws numbers: 0.1, 0.2, 0.3, 0.4, 0. (4) station d draws numbers: 0.36, 0.77, 0.9, 0.1, 0.1, 0.1, 0.1, 0. (b) in slotted aloha, a station transmits in each time slot with a given probability. what probabilities would you assign to each of the four stations so as to: (i) maximize the efficiency of the protocol? (ii) maximize fairness among the four stations? (c) will the efficiency increase or decrease if we modify slotted aloha as follows: (i) get rid of slots and allow stations to transmit immediately? (ii) implement carrier sensing? (iii) implement collision detection? (iv) implement collision avoidance?

Which option allows you to view slides on the full computer screen?

The managing director of a company sends a christmas greeting to all his employees through the company email. which type of network does he use? he uses an .