A fair coin is tossed twice. Consider the sample space Sequals{HH, HT, TH, TT} of equally likely simple events. Define the events as shown below. For each pair of events, discuss whether they are independent and whether they are mutually exclusive. Complete parts (A) and (B). Upper E 1equalsa head on the first toss Upper E 2equalsa tail on the first toss Upper E 3equalsa tail on the second toss Upper E 4equalsa head on the second toss