Understanding Lighting

I tried earlier with understanding lighting with Mrs. Moran.
Later that day, I tried using multiple subjects. Below is the picture that I took.

Sue, Ginny, Murphy, and Katie - f/16, 1/200s, ISO-200

Some self critiques: 

• Lighting is harsh in the face. 
• Corrective Action: I should of positioned them with the sun to the right, and had the flash to the left. This would of made for more even lighting. 
• Angle the Light from above to reduce the shadow created from Murphy.
• Clipped of Harry (bottom Right of photo)
• I should of rotated/backed up to include him in the photo.
• Increased the F-stop
• Would of blurred the background out, not made it as distracting. Move everyone so you wouldn't see the cars in the background.