Please answer all $3$ questions. I$\text{'}$m lost so please explain.

Please indicate all possible hydrogen bond interactions in an aqueous solution. Show one molecule of trimethylamine $N(C{H}_3{)}_3$ in water. The angles should be such as to provide the strongest hydrogen bonds.

Please indicate all possible hydrogen bond interactions in an aqueous solution. Show one molecule of ethanol $(C{H}_{3}C{H}_{2}OH)$ in water. The angles should be such as to provide the strongest hydrogen bonds. Angles have to be $180$

Please indicate all possible hydrogen bond interactions in an aqueous solution. Show one molecule of acetone $(C{H}_{3}COC{H}_3)$ in water. The angles should be such as to provide the strongest hydrogen bonds.