Consider sampling the 300 students, in a different way, to obtain a sample of 150 students. Alongside each name, the numbers 1 and 2 are listed alternately (1, 2, 1, 2,... ). A fair coin is tossed. If the outcome is heads, the sample is taken to be the 150 students with a '1' next to their name. If the outcome is tails, the sample is the 150 students with a '2' next to their name. a Using this method, how many possible samples of 150 can be obtained? b Does every student have the same chance of selection? c Is this a simple random sample?