Colored Anime Manga Splash Panel

Using REFERENCE_0 as the rough composition guide and REFERENCE_1 as the cleaned pose/layout guide, turn the sketch into a polished full-color anime manga panel. Keep the same 4-character arrangement and poses: 1 large muscular student centered in back flexing, 1 blond student on the right flexing, 1 small white-haired student on the left in a crouched power pose, and 1 red-haired character cropped large in the lower-left foreground reacting in shock. Replace the rough construction lines with clean inked line art, cel shading, and finished school-uniform colors. Add a high-energy manga background that was not in the references: dense blue radial speed lines, halftone texture, blue and yellow star shapes, and yellow comic burst accents. Keep 1 jagged speech bubble at the lower right with vertical Japanese text reading なにしてんの?. Make the final image look like a dramatic comedic shonen manga splash panel, with crisp outlines, saturated colors, and dynamic impact effects.