1. Define sub and supercritical bifurcations in dynamical systems and describe in your own words how they can manifest themselves in engineering systems. In your argument, please focus on the saddle-node bifurcations. 2. Length and format: Please write around one page A4 (400 words equivalent) including equations and graphs. 3. Method: Please type you answer, draw figures, integrate into one document in a pdf format and upload. The figures should be drawn by yourself (not copied from internet), either by hand or using software. The derivations can be either typed in math editor or handwritten, scanned/photographed and then integrated with the main body of the text.