Stay at Home! This the largely stated term we are listening and using amid Corona Virus pandemic. A well known school is intending to develop an online learning system. The senior architect of your IT Company has had a meeting with most of the stakeholders. What quality attributes the system would need to possess. Does the system need to be more scalable, more available, more usable, more reliable, more secure, more modifiable, more testable, more interoperable or more portable. Choose any 2 of the most important and critical quality attributes in this scenario. Comment you answer in detail by giving reasons that why would you go for the particular quality attributes.

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?