1.
1) these
2) this
3) this
4)these
5) this
6) this
7) these
8) these
2.
1) b
2) a
3) b
4) a
5) a
6) b
7) a
3.
1) those
2) that
3) this
4) these
5) those
6) that
7) this
8) this, that
9) this
10) that
11) these
12) that
13) this, that
14) those
15) this