i. ii. iii.
i ii iii i
ii
i
iii
i
ii
i
iii
ii
iii
i ii
i
ii
i
ii
i
iii
ii
iii
i, ii
iii
iii
i ii iii
→ X
ii
iii
→X →
i ii
iii
→Y
i. ii. iii.
Y i ii iii i
ii
i
iii
ii
iii
ii
iii
i, ii
iii
i. ii. iii. i
ii
i
iii
i, ii
iii
i
iii
ii
iii
i, ii
iii
i. ii. iii.
i ii iii i
ii
i
iii
i
ii
i
iii
ii
iii
i ii
i
ii
i
ii
i
iii
ii
iii
i, ii
iii
iii
i ii iii
→ X
ii
iii
→X →
i ii
iii
→Y
i. ii. iii.
Y i ii iii i
ii
i
iii
ii
iii
ii
iii
i, ii
iii
i. ii. iii. i
ii
i
iii
i, ii
iii
i
iii
ii
iii
i, ii
iii