As announced on March 15, 2020, the Board reduced reserve requirement ratios to zero percent effective March 26, 2020. This action eliminated reserve requirements for all depository institutions."(Source: The Federal Reserve Board) \"The Fed purchased longerterm securities on the open market, including US. Treasuries and mortgagebacked bonds."(Source: lnpIhas-1k.:::.:m'i,=') With the aid of diagrams (reserve market, AD-AS model), explain What would happen to the interest rates and economy, if the Fed used these tools simultaneously, ceteris paribus. (13 marks)