A fair coin is tossed 3 times.

(a) Identify all of the following sets which could be used a sample spaces for this experiment, where H denotes "Heads" and T denotes "Tails":

s1 ={HHH,HHT,HTH,THH,HTT,THT,TTH,TTT}

s2 = {3H,2H,1H,3T} s3 = {at least one H, at least one T} s4 = {fewer H than T, fewer T than H}

s5 = {at least one H, no T}

(b) Which of the sample spaces identified in part (a) is/are equiprobable?