Mitch is buying candy bars for his friends. He wants to give 2 bars to each friend, and he wants to have 10 spare bars. He can afford to buy 16 candy bars.What is the algebraic sentence that will help him figure out how many friends he can treat? Let f= the number of friends (1. 1/2f-10=16 (2. 2f-10=16 (3. 2f+10=16 (4. 1/2f+10=16