the below and above ground drip irrigation line with a diameter of 13.7 mm is installed underground where it is not visible and serves the irrigation of bordering plants and lawn areas.

How would the previous sentence be correctly capitalized?
Answer: The Below and Above Ground Drip Irrigation Line with a diameter of 13.7 mm is installed underground where it is not visible and serves the irrigation of bordering plants and lawn areas.
"so what's the point, then?" you asked. "when i get reborn, i'll just be a blank slate, right? a baby. so all my experiences and everything i did in this life won't matter."

How would the previous sentence be correctly capitalized?
Answer: "So what's the point, then?" You asked. "When I get reborn, I'll just be a blank slate, right? A baby. So all my experiences and everything I did in this life won't matter."
the country's population is set to grow by 50 percent, corresponding alpha add a new canberra each year.

How would the previous sentence be correctly capitalized?
Answer: The country's population is set to grow by 50 percent, corresponding alpha add a new Canberra each year.
attached bases in pdf format. the rally will run in azpeitia, being a mountain tour is advisable to bring suitable clothing and footwear.

How would the previous sentence be correctly capitalized?
Answer: Attached bases in PDF format. The Rally will run in Azpeitia, being a mountain tour is advisable to bring suitable clothing and footwear.