Question 4: Bathtub Failures: Short Answers [10pts] Refer to the Bathtub failure rate curve figure that we have discussed in-class and answer the following questions: Q Q) w Failure Rate - 1(t) Time (It) 3) Label the regions I, II, and III of the bathtub failure curve [3pts] b) What is burn-in testing and what region it is typically applied in? [2pts] c) What is a good CDF model for region ll, why? [1pts] d) If a component has an increasing failure rate, is the RC: + To) R(t) for a given To, why? [2pts]