Advanced R Programming & Data Analysis

I'm in need of a professional R programmer who is versed in using RStudio. Your task will be to complete an advanced quiz focused on R programming, particularly pertaining to:

- Data Analysis
- Visualization

Your ability to analyze, interpret and visualize complex datasets using R will be put to test.

Skills and experience required:
- Advanced skills in R programming
- Comprehensive experience with RStudio
- Data analysis and visualization expertise
- Ability to solve complex problems and work under time constraints

Please ensure you have a high level understanding and experience in these areas before submitting a bid.