7. Sometimes a single linked list is given two different orders by attaching two pointers to each entry rather than one. Fill in the table below so that by following the first pointer after each letter one finds the name Petra, but by following the second pointer after each letter one finds the letters in alphabetical order. (2 points) What values belong in the head pointer of each of the two lists represented? (2 points)

Address Contents

74 R

75

76

77 P

78

79

80 E

81

82

83 A

84

85

86 T

87

88