Assume that no banks hold excess reserves and the public holds
no currency (which implies that ER = C = 0). If a bank sells a
$100,000 security to the FED, explain what happens to this bank
(Bank A) and two additional steps (or two additional banks, Bank B
and Bank C) in the deposit expansion process assuming a 10% reserve
requirement. Put differently, what will be the change in deposits
for the first bank (ΔDA), the second bank (ΔDB),...