A.1490kN B.1441.4kN C.1478kN D.1445.3kN
A.18kPa B.28kPa C.38kPa D.48kPa
A.12.1 B.13.0 C.14.1 D.15.0
A.4.2 B.4.8 C.5.2 D.5.6
A.15 B.17 C.19 D.22