Photo Merging with Black and White

I need to merge people from three different photos into one cohesive image. The final image should have a plain color background and be in black and white.

Requirements:
- Merge three photos of people into one image
- Use a plain color background
- Convert the final image to black and white
- Arrange subjects logically

Ideal skills and experience:
- Proficiency in photo editing software (e.g., Photoshop)
- Strong understanding of composition and blending
- Experience with black and white photography and editing