"U.S. consumer inflation accelerated to 9.1% in June, a pace not seen in more than four decades, adding pressure on the Federal Reserve to act more aggressively to slow rapid price increases throughout the economy."

- Source: Gabriel T. Rubin, "U.S. Inflation Hits New Four-Decade High of 9.1%" The Wall Street Journal, July 13, 2022

1) The U.S. has experienced historic inflation since 2021, as the economy started to recover from the recession caused by Covid-19 pandemic. Explore and summarize the possible causes of the post-covid inflation.