$\frac{15}{2}$

$\frac{23}{4}$

$\frac{25}{6}$

$\frac{35}{9}$

4

5

6

7

I-a, II-c, III-b

I-b, II-a, III-c

I-b, II-c, III-a

I-c, II-a, III-b

19

18

17

16

$>\ \ <$
$<\ \ >$

$>\ \ \ \ >$
$<\ \ \ \ >$

$<\ \ \ >$

$<\ \ \ \ >$

4

5

6

7