68_Exercise36
69_Exercise37
70_Exercise38
71_Exercise39
72_Exercise40
73_Exercise41
74_Exercise42
75_Exercise43
76_Comparison22
77_Quiz12
78_Exercise44
79_Comparison23
80_Exercise45
81_Comparison24
82_Exercise46
83_Comparison25
84_Quiz13
85_Exercise47
86_Comparison26
87_Quiz14
88_Exercise48
89_Comparison27
90_Exercise49
91_Exercise50
92_Comparison28
93_Quiz15
94_Exercise51
95_Exercise52
96_Comparison29
97_Exercise53
98_Exercise54
101_Exercise55
102_ Comparison30
103_ Comparison31
104_Comparison32
105_Quiz16
106_Exereise56
107_Comparison33
108_Exereise57
109_Comparison34
110_Comparison35
111_Quiz17
112_Exereise58
113_Comparison36
114_Exereise59
115_Comparison37