What is the ordinate of influence line at Q for reaction at S as shown in figure given below ? (Beam P-Q-R-S with internal hinge at Q, supports at P, R, and S. Distances: PQ=3m, QR=3m, RS=6m)

(Aromatic compound with an isobutyl side chain) $\xrightarrow[KOH, Heat]{KMnO_4}$ ?