Correctness is key. The other ones are optimizations at most. Although I would always include humor... ;-)
Answer:

Explanation:
We'll be using u-substitution for this problem.
Let

Substitute

Split the fraction

Move the constants out

Simplify

Integrate

Substitute

Answer:
if(i>1)
{
Console.WriteLine(i*i);
Console.WriteLine(i*i*i);
}
Explanation:
This is written in C#, and it's probably not as clean as it could be. I'm not sure what language you wanted it in, so I just picked the one I'm most familiar with.
Solution:
Running computer programs and their data are stored in Rom.
ROM is "built-in" computer memory containing data that normally can only be read, not written to. ROM contains the programming that allows your computer to be "booted up" or regenerated each time you turn it on. Unlike a computer's random access memory (RAM), the data in ROM is not lost when the computer power is turned off. The ROM is sustained by a small long-life battery in your computer.
Answer:
Secure the personal information with complex multi-factor authentication and configure intrusion detection and prevention and a firewall.
Explanation:
Multi-factor authentication is a method of securing a client's personal information from the client's side to the data centre. It uses more than one security processes not policies. There key be three authentications process like a password, security token and biometrics or two authentications like password and biometrics or token.
The firewall and intrusion detection and prevention are vulnerability preventive method to detect and stop cyber attacks.