Solution:L ≤ H = P > O > D ≥ S = U
Conclusions:
1) L ≤ P (true) as per the statement L ≤ H = P so now, L ≤ P
2) U ≥ D (false) as per the statement D ≥ S = U hence, D not U ≥ D
3) L > D (false) as per the statement L ≤ H = P > O > D
4) L > O (false) as per the statement L ≤ H = P > O