Marcus is a video editor who works for the film industry. His job involves editing large pictures, sounds, and video files. Given the nature of his job, Marcus will require a computer with a minimum speed of 3.5 Gigahertz

dual processor

Explanation:

CPU is one, if not the most important thing to consider when using computers for different purposes because it is considered to be the brain of the computer. When dealing with large files and it involves editing of videos and music files, a clock speed of between 3.5 GHz to 4.0 GHz is great coupled with a dual processor, as single-core processors might not work properly for these purposes.