The question is not incomplete. These motors in the question simply indicate the motors of a random manufacturer

400 9 time to failure in years of these motors has the density function f(t) = t 20. (1+t)s (1) Find the reliability function and determine the reliability for the first year of operation. () Compute the MTTF. (iii) What is the design life for reliability 0.90? (iv) What is the reliability function after two years of operation? 400 9 time to failure in years of these motors has the density function f(t) = t 20. (1+t)s (1) Find the reliability function and determine the reliability for the first year of operation. () Compute the MTTF. (iii) What is the design life for reliability 0.90? (iv) What is the reliability function after two years of operation