Please answer each part in 400-500 words.

a. In current scenario of covid19 pandemic organizations are taking full advantages of IT infrastructure not only for their survival but also for business growth. With the help of suitable examples explain how organizations are using applications of cloud computing during such unprecedented times. Explain certain security challenges in implementing cloud computing in business organizations?

b. Green computing is a practice of using computing devices so that they can be used efficiently and without causing harm to human beings and environment. The purpose of promoting green computing is to reduce the consumption of energy and to reduce carbon emission (CO2 emission). Suggest few actionable points/ drivers for achieving green computing and green ICT at your home, in your organization and society.