Question

A consumer's marginal utility ($MU$) for the first three consecutive glasses of fruit juice consumed is $27$ utils, $35$ utils, and $23$ utils respectively. If consuming the $4\text{th}$ glass brings total utility ($TU$) to $97$ utils, and the consumer reaches the satiety point at the $6\text{th}$ glass where total utility is maximized at $101$ utils (with $TU$ for the $5\text{th}$ glass also equal to $101$ utils), which of the following correctly identifies the unit at which the Law of Diminishing Marginal Utility first sets in, the $MU$ of the $4\text{th}$ glass, and the $MU$ at the satiety point?