Consider the following limit order book for a share of stock.

Limit Buy Orders			Limit Sell Orders
Price	Shares		Price	Shares
$49.75	500		$49.80	100
49.70	900		49.85	100
49.65	700		49.90	300
49.60	400		49.95	100
48.65	600

a. If a market buy order for 300 shares comes in, at what price(s) will it be filled?

b. Immediately after the order in a) is executed, what is the bid-ask spread of the stock? (Keep two decimal places.)

Bid ask spread?