Which command line can be used to rename the file "some.txt$"$ to "some.dat" if a SIGQUIT signal is received?

trap $"$rm some.dat some.txt$"3$

SIGTRAP mv "some.txt$"$ "some.dat"

trap $"$rm some.txt some.dat" $3$

cp "some txt$"$ "some dat" on SIGQUIT

trap $"$cp some.txt some date" $5$

trap $"$mv some.txt some.dat" $3$