Using T$-$accounts for SecondBank, please show the initial effects of the following events. Use separate T$-$accounts for each question.

a$.$ A cash deposit into a saving account of $$4000.$

b$.$ A $$2000$ check is deposited into a checking account.

c$.$ An open market purchase of $$100$ million. The Fed buys $$100$ million worth of securities from SecondBank.

d$.$ Secondbank receives a loan payment of $$200$ in cash.