0.43 d
0.537 d
0.68 d
0.85 d
1.5 and 2.2
2.2 and 1.5
1.5 and 1.5
2.2 and 2.2
^acybd2
0.185acybd2
0.43acybd2
to decrease it
to increase it
either to decrease or to increase it
to keep it unchanged
(i) and (ii)
(ii) and (iii)
only (iii)
All (i), (ii) and (iii)