a manufacturer guarantees a product for 2 years. the time to failure of that product after it is sold is given by the probability density function f(t) below, where t is time in months. f(t)= 0.009e^−0.011t if t≥0 0 otherwise What is the probability that a buyer chosen at random will have a product failure (A) During the warranty? (B) During the second year after purchase?