Suppose that over the next several years, there will be 50 cardiac incidents at Sprint to Life. Without a defibrillator, 15 victims will die before paramedics arrive. With a defibrillator, there is an 80% probability of saving a victim who would die without it. However, there is a 3% probability that improper use of the defibrillator will kill a victim who would have otherwise lived. Find the expected number of lives saved by the defibrillator.