Challenge 1: Mismatched White Balance Between Two Shots — Solution Walkthrough

The answer:

This is a color correction problem, not a color grading problem.

Why, per this chapter's own definitions:

Color correction is defined in this chapter as fixing technical
problems — exposure, white balance, matching shots from different
cameras or lighting to look consistent. A white balance mismatch
between two shots in the same scene is exactly this kind of technical
inconsistency: something objectively wrong that needs fixing so the
two shots look like they belong in the same continuous scene, not a
creative or stylistic choice being made on purpose.

Why this isn't a color grading question:

Per this chapter's own definitions, color grading is a creative,
stylistic choice applied on top of already-corrected footage — used
to establish a mood or look, not to fix something broken. Since
nothing here is a deliberate stylistic decision — the mismatch is an
unintended technical inconsistency from filming conditions — this
falls squarely on the correction side of the distinction.

What the fix looks like:

Using the color wheels (Lift/Gamma/Gain) to adjust each shot's own
white balance so both match consistently, ideally checked against
scopes rather than relying purely on how it looks by eye, per this
chapter's own material on both of those tools.

WHY THIS WORKS AS AN ANSWER
------------------------------
This exercise checks that the correction-vs-grading distinction from
this chapter is applied correctly to a concrete, realistic scenario —
correctly identifying an unintended technical mismatch as a correction
problem, not a grading one.