please use reference and i need examples

Faced with skills shortages globally, international businesses need to radically improve their approaches to human resources management. Therefore:

a) Describe the three main approaches to international staffing, their advantages and disadvantages, and when each is best used. (9 marks)

b) What are the main concerns of organised labour, and how can an international business address these positively? (8 marks)

c) Are automation and home and remote working the answers to the emerging challenges of skills shortages? (8 marks)

this question is from international business