Describe the most recent wave of inflationary pressures in the USA (United States of America), most likely (late) 2021 and 2022. Specifically

a. Present some statistics illustrating the severity of the inflation surge, its duration, and its impact on inflation expectations and pay settlements. (10%)

b. Discuss the main origins. List no more than four of the main factors, but focus on the two most important ones. (20%)