5.-Contributing.md

+# Contributing Guidelines
+
+Thank you for contributing to this project! Please follow the guidelines below to maintain consistency in the project, especially for visualizations.
+
+## General Guidelines
+
+1. **Use Markdown**: All documentation should be written using Markdown to ensure readability and consistency across the project.
+   
+2. **File and Folder Structure**: Make sure your code is saved in the `rcode` folder, and images are placed in the `images` folder.
+
+3. **Commit Messages**: Use clear and concise commit messages that describe the changes you’ve made.
+
+## Visualization Guidelines
+
+To ensure uniformity, all visualizations should use the following font and color scheme:
+
+### Font
+- **Sans-serif**: Use a generic sans-serif font, which is the default in most systems, such as Segoe UI on Windows or San Francisco on macOS.
+
+### Color Palette
+- **Green**: `#608C32`
+- **Blue**: `#0063A7`
+- **Black**: `black`
+- **Grey**: `grey50`
+
+### Applying the Theme
+
+Here is the R code snippet to use for ensuring that your visualizations follow the correct color palette and font:
+
+```r
+# Define color palette and formatting
+color_green <- "#608C32"
+color_blue <- "#0063A7"
+color_black <- "black"
+color_grey <- "grey50"
+font_family <- "sans"  # Use a generic sans-serif font
+font_size <- 30
+axis_label_size <- 30
+
+# Set the theme for all plots
+custom_theme <- theme(
+  text = element_text(family = font_family, size = font_size),
+  legend.position = "right",
+  legend.title = element_text(size = axis_label_size, face = "bold"),
+  legend.text = element_text(size = axis_label_size),
+  plot.title = element_text(size = font_size + 10, face = "bold", hjust = 0.5, color = color_green)
+)