Answer :
well if r=8
2(8)≤ 3(8)-8
16≤ 16
if r=9
2(9)≤3(9)-8
18≤ 19
if r=10
2(10)≤ 3(10)-8
20≤ 22
2(8)≤ 3(8)-8
16≤ 16
if r=9
2(9)≤3(9)-8
18≤ 19
if r=10
2(10)≤ 3(10)-8
20≤ 22