What would be the third number in the sequence when you follow the given instruction?
a. Start at 4. Subtract 2 and multiply by 3.
4, -- , -- , _
b. Start at 5. Multiply by 2 and subtract 3.
5, -- , -- , _
c. Start at 8. Subtract 6, multiply by 3 and then add 2.
8, -- , -- , _
d. Start at...