Answer:
Answer is the soloist plays alone.
Refer below.
Step-by-step explanation:
After a loud, decisive close similar to what you heard at the end of the exposition, the orchestra stops playing. After the silence, the soloist plays the cadenza, which features bits and pieces from themes blended into virtuosic passages. The cadenza different from the other sections of first-movement concerto form:
Because the soloist plays alone.