MUSIC THEORY FUNDAMENTALS - Chapter 10, Exercise 1 Solution
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Rewriting the Ending as a Deceptive Cadence

PROBLEM
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Rewrite this chapter's own consequent phrase (bars 5-8) so that it ends
with a real deceptive cadence instead of a perfect authentic cadence -
state which chord bar 8 would need to become, and explain your
reasoning using Chapter 8's own material.

SOLUTION
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The capstone's own current bar 8 is C major (I), preceded by G major (V)
in bar 7 - a perfect authentic cadence (V -> I).

Chapter 8's own cadence table defines a deceptive cadence as V resolving
to vi instead of I. In C major, per Chapter 7's own diatonic chord set,
vi is A minor.

Rewritten bars 7-8:

    Bar 7: G major (V)  -  unchanged
    Bar 8: A minor (vi)  -  changed from C major (I)

ANSWER: Bar 8 would need to become A minor (vi) instead of C major (I),
producing the motion V -> vi (G major to A minor) instead of V -> I.

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WHY THIS WORKS AS AN ANSWER

This is a direct substitution using Chapter 8's own stated deceptive-
cadence rule. The rewritten ending would still feel harmonically
prepared by the same G major (V) chord as the original, but the actual
arrival on A minor rather than C major would create the real "hanging,"
surprised sensation Chapter 8 described - the listener's ear, primed for
resolution to the tonic, is instead redirected somewhere related but
genuinely unexpected.