Been having a bit of trouble with some of the elements in this question...

The question is:

Someone deposits $30,000 into a local bank. The desired reserve ratio is 25%, and the bank was justmeeting its desired reserve ratio prior to the deposit.

a) How much of this new deposit will this bank hold in reserve? How much does the deposit create in excess reserves?

I'm pretty sure I got the first part of this right...

Desired Reserves = $30,000 * .25

Desired Reserves = $7,500

Therefore $7,500 would be held in reserve.

But the second part I'm not too sure how to tackle because I don't have the actual reserves

b) What is the value of the money multiplier? What is the potential increase in the money supply that this new deposit can generate?

Well I know that...

Money Multiplier = 1 / Desired Reserve Ratio

Money Multiplier = 4

So, the potential money supply increase would be $30,000 * 4 which equals $120,000 (not sure if I am correct)

c) Suppose this same bank sells $30,000 in securities to the Bank of Canada. How much in excess reserves will this transaction create for the bank? By how much can the money supply potentially increase as a result of this

transaction?

No clue how to approach this question Any help/guidance/confirmation would be appreciated.

Thanks