\"id. Jessioa Salas, president of Salas Products, is reviewing the warranty polioy fer her company's new model of automobile batteries. Life tests performed on a sample of 100 batteries indicated: {1} an average life of 7'5 months, (2) a standard deviation of 5 months, and {3} a bell shaped battery life distribution. Approximately 99.?% of the batteries will last between a) T0 and 80 months b) 60 and 90 months o} 65 and 35 months d} 55 and 95 months e} 50 and 100 months