The following represent treatment totals for sugar beets yield of following Three planting dates, two sprays, evaluated using RCB with 4 blocks in a split plot design Determine the orthogonal coefficients for the indicated comparisons:

D1S0 D1S1 D2S0 D2S1 D3S0 D3S1
Treatment totals(Yi) 112.6 146.2 121.5 142.5 99.6 120

Date (D)
D1VD2+D3
D2VD3

Spray (S)
S0vS1
DXS
(S0VS1)(D1vD2+D3)
(S0vS1)(D2vD3)

Determine the contrats coefficients for the above group comparison.