A mixture of Si(OCH₃)₄, (CH₃)₄NOH(aq), and Al(OCH₂CH₂CH₃)₃ was heated to drive off alcohol, resulting in a clear solution. This solution was heated at 130 °C in a sealed autoclave for 8 days. The resulting white precipitate was washed with distilled water and dried at 100 °C, yielding a white powder A whose X-ray-diffraction pattern was very similar to that of the mineral gismondine (CaAl₂Si₂O_8·4H₂O). Chemical analysis of A gave weight percentages N 4.2%, C 14.5%, H 4.2%, Al 8.1%, Si 25.4%, O 43.5%.

(a) Calculate the empirical formula of A.

(b) Given that the X-ray-diffraction pattern is similar to gismondine, suggest a sensible molecular formula for A.

(c) In light of your answer to (a) and (b), discuss how template molecules may be used to influence the hydrophilicity of zeolites.