Imagine the following order book for stock A:

If you want to buy $10$ shares of A with a market order, what is the

average execution price you would pay?

If you place a limit$-$buy order at $$9\mathrm{.}99,$ what are the chances that

your order would be executed?

The average execution price is $10\mathrm{.}02$ ; and limit$-$buy order at $$9\mathrm{.}99$ is

likely to be executed.

The average execution price is $10\mathrm{.}025$ ; and limit$-$buy order at $$9\mathrm{.}99$ is

likely to be executed.

The average execution price is $10\mathrm{.}025$ ; and limit$-$buy order at $$9\mathrm{.}99$ is

unlikely to be executed.

The average execution price is $10\mathrm{.}03$ ; and limit$-$buy order at $$9\mathrm{.}99$ is

unlikely to be executed.