I just need help with the last one, thank you.

Upside:

No margin:

>Purchase 100 shares @ $50 and sell them @ $70 in 1 year.

>Profit = $2000 & Return = 2000/5000 profit/initial investment

Margin:

>Purchase 200 shares @ $50 by borrowing $5000 at 9%.

>Sell 200 shares @ $70 in 1 year

>Profit = ?

>Return = ?

What if stock price goes to $30 instead of $70?

>No Margin:

On Margin: