Given the above limit order book, what is the spread?

$.10,$10.10,$.20,$10.20,

what is the depth-at-ask?

$10.20, 5000 shares, $10.10, 10,000 shares

Which of the following is true after the arrival of a market buy order with quantity 18,000 shares?

0 trades, 1trades, 2trades, 3trades

ask5 ask4 ask3 ask2 ask1 bid1 bid2 bid3 bid4 bid5 Price ($) 10.50 10.40 10.30 10.25 10.20 10.10 10.05 10.00 9.90 9.85 Quantity (# of shares) 50,000 45,000 5,000 20,000 10,000 5,000 10,000 4,000 10,000 20,000