and, mobile bookings are increasing at a rate of 20% or more each year in many countries.

How would the previous sentence be correctly capitalized?
Answer: And, mobile bookings are increasing at a rate of 20% or more each year in many countries.
in particular he began research on engineering problems and problems relating to fortifications.

How would the previous sentence be correctly capitalized?
Answer: In particular he began research on engineering problems and problems relating to fortifications.
safe deposit box (on rental)

How would the previous sentence be correctly capitalized?
Answer: Safe deposit box (on rental)
it provides their customers the opportunity to fill out and sign standard webforms directly on the website.

How would the previous sentence be correctly capitalized?
Answer: It provides their customers the opportunity to fill out and sign standard webforms directly on the website.