Please capitalize where necessary: this book is not intended as mentioned before, to be a technical or professional scientific work.
A: This book is not intended as mentioned before, to be a technical or professional scientific work.

Q: kbdcz.dll program freezing and system crashing: important system components such as kbdcr.dll and kbdcz1.dll become abnormal.

A: KBDCZ.DLL program freezing and system crashing: Important system components such as KBDCR.DLL and KBDCZ1.DLL become abnormal.

Q: meet new people in barcelona
A: Meet new people in Barcelona

Problem: many places enjoy large, enthusiastic youth groups, and we are committed to providing numerous and varied opportunities for all age groups so people can experience personal growth in a healthy and safe environment.
Can you repeat this sentence, but capitalize it?
Answer: Many places enjoy large, enthusiastic youth groups, and we are committed to providing numerous and varied opportunities for all age groups so people can experience personal growth in a healthy and safe environment.

Text: this can help companies in their decisions of what offers to make to which markets.

Correct capitalization: This can help companies in their decisions of what offers to make to which markets.

Please capitalize where necessary: to take an extreme example, there is no pigmentation in the skin of an albino because of a defect in melanin metabolism.
A:
To take an extreme example, there is no pigmentation in the skin of an albino because of a defect in melanin metabolism.