Analyze the purpose of validating forensic data and determine why this is a necessary component of the investigation and analysis process discussion help

I just need 4-5 sentence paragraphs for each question below:

Analyze the purpose of validating forensic data and determine why this is a necessary component of the investigation and analysis process.
As a system forensics manager, justify the importance of validation and determine the best method to use.
Evaluate the importance of graphic files to a digital investigation. Provide a scenario where a graphic file would be considered an invaluable piece of evidence.
Use the Internet or the Strayer Library to research and select at least one case or investigation where a graphic(s) file was used as a critical piece of evidence. Be prepared to discuss.