Which sentence uses capitalization correctly?

a my friend, akemi, was born in tokyo.
b mount daimonji lies just outside the city.
c the kamo river flows through kyoto.

on my last

vector v such that t( p) = p+ v

the boy's acceleration toward the girl is 2.08 m/s^2.

explanation:

according the newton's third law, the force causing the girl accelerate towards the boy will be me with equal counter-force causing the boy to accelerate towards the girl. these forces will be of equal magnitude and allows us to determine the boy's acceleration:

the boy's acceleration toward the girl is 2.08 m/s^2.