Choose all the statements that are true about this sequence. 60, 66, 72, 78

1: The value of the first term is 1.
2: This is an arithmetic sequence.
3:The value of the third term is 72.
4: The sequence starts at 60 and adds 4 repeatedly.
5:The sequence starts at 66 and adds 6 repeatedly.
6: There are four terms in this sequence.
7:The sequence starts at 60 and adds 6 repeatedly.