$1.$ What is the NBBO spread? Present it as a pair of prices.

$2.$ When a new buy limit order for $200$ shares with the price of $$125\mathrm{.}79$ arrives on the market, it will be added on the bid$/$ask side and above the existing quote with the price of $$\_\_\_\_\_\_\_\_\_\_\_$

$3.$ When a new sell limit order for $50$ shares with the price of $$126\mathrm{.}04$ arrives on the market, it will be added on the bid$/$ask side and below the existing quote with the price of $$\_\_\_\_\_\_\_\_$

$4.$ Assume the limit order book is exactly what you see on the table above $($that is$,$ disregard any events in Questions $1-3$ above$).$ Suppose you submit a sell market order for $1,000$ shares. What would be your average execution price?

$5.$ Referring to the question above, what would be the price impact of your order?

$6.$ The following question does not refer to the table above. Suppose you have three dealers on the exchange and they quote the following prices for a stock:

a$.$ Dealer A: $324\mathrm{.}34-324\mathrm{.}45$

b$.$ Dealer B: $324\mathrm{.}40-324\mathrm{.}47$

c$.$ Dealer C: $324\mathrm{.}29-324\mathrm{.}50$

What is the market spread on this exchange? Present it as a pair of prices. $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

$7.$ Suppose you purchased a stock for $$75$ and would like to protect your position with a limit order. What limit order type would you place and what price would you indicate, assuming you are willing to lose at most $$3$ on your position. Assume there are no transaction costs.

a$.$ Buy stop$-$loss order at $$78$

b$.$ Buy stop$-$loss order at $$72$

c$.$ Sell stop$-$loss order at $$78$

d$.$ Sell stop$-$loss order at $$72$