Among P, Q, R, S, T, and U, who is the heaviest?
Statement I - P is heavier than T and U and he is the second heaviest in the group.
Statement II - S is heavier than Q but not the heaviest.
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. a healthy diet and regular exercise
Q. are important habits
R. that help maintain good physical and mental health
S. especially in today's busy world