# Script to translate into Java for Project 4 import random class LottoSelection: # num_balls is the total number of balls # available for drawing with replacement # num_draws is the number of balls that are # drawn, typically 4, 5, or 6. def __init__(self, num_balls, num_draws): self. num_balls = num_balls if num_draws > 6: self. num_draws = 6 else: self. num_draws = num_draws self._balls = [0, 0, 0, 0, 0, 0] def __str__(self): output = '' for i in range(0, self. num_draws): output += str(self._balls[i]) + ' ' return output def draw_balls(self): for i in range(0, self. num_draws): self._balls[i] = \ random. randrange(self. num_balls) # main script lotto = LottoSelection(20, 5) lotto. draw_balls( ) print(lotto) lotto. num_draws = 6 lotto. num_balls = 30 lotto. draw_balls( ) print(lotto)

17. implement the jvm dload instruction for the mic-2. it has a 1-byte index and pushes the local variable at this position onto the stack. then it pushes the next higher word onto the stack as well

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?

Kirk found a local community college with a two-year program and he is comparing the cost with that of an out-of-state two-year school. what is the expected total cost for one year at the local community college if kirk lives at home? what is the expected total cost for one year at the out-of-state school if kirk lives on campus?