FTWARE RELIABILITY AND QU X + C File | C:/Users/Yebs/Downloads/dow... of 5 Q + SECTION C: ANSWER ALL THE QUESTIONS. EACH IS WORTH 15 MARKS Q1. The time till failure of a part, T years, has the probability density function belo and is zero elsewhere, where k is a constant. f(t) = kr4 (t > 1) i. Sketch a graph of the failure rate against time. What does the shape of this graph tell you? [15 marks) Q2. 50 components are tested for two weeks. 20 of them fail in this time, with an average failure time of 1.2 weeks. What is the mean time till failure assuming a constant failure rate? [15 marks] te gei her abs FTWARE RELIABILITY AND QU X + C File | C:/Users/Yebs/Downloads/dow... of 5 Q + SECTION C: ANSWER ALL THE QUESTIONS. EACH IS WORTH 15 MARKS Q1. The time till failure of a part, T years, has the probability density function belo and is zero elsewhere, where k is a constant. f(t) = kr4 (t > 1) i. Sketch a graph of the failure rate against time. What does the shape of this graph tell you? [15 marks) Q2. 50 components are tested for two weeks. 20 of them fail in this time, with an average failure time of 1.2 weeks. What is the mean time till failure assuming a constant failure rate? [15 marks] te gei her abs