agriculture faces enormous challenges over the coming decades. agricultural entrepreneurs have to keep pace with rapid population growth and the need to deliver food at progressively more competitive prices.

How would the previous sentence be correctly capitalized?
Answer: Agriculture faces enormous challenges over the coming decades. Agricultural entrepreneurs have to keep pace with rapid population growth and the need to deliver food at progressively more competitive prices.
you may think that this software might be complicated and you may not be able to follow the steps involved in it.

How would the previous sentence be correctly capitalized?
Answer: You may think that this software might be complicated and you may not be able to follow the steps involved in it.
did someone email you a zexp file and you're not sure how to open it? maybe you have found a zexp file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a zexp file related error message.

How would the previous sentence be correctly capitalized?
Answer: Did someone email you a ZEXP file and you're not sure how to open it? Maybe you have found a ZEXP file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a ZEXP file related error message.
internet services , car hire , wi-fi/wireless lan , free wi-fi internet access included

How would the previous sentence be correctly capitalized?
Answer: Internet Services , Car Hire , Wi-Fi/Wireless LAN , Free Wi-Fi Internet Access Included