A.35d B.37d C.max(35d,500) D.max(37d,500)
A.Hn/3 B.Hn/6 C.max(Hn/6,hc,500) D.max(Hn/3,hc,500)
A.1.2lae B.1.5lae C.max(Hn/6,hc,500) D.Hn/3