Consider the following data and solve questions

Bid Quantity	Bid Price	Ask Price	Ask Quantity
		$150.00	1
		102.56$	2550
		102.15$	255
		102.10$	178
		102.05$	425
		101.91$	500
		101.84$	200
		101.75$	225
		101.55$	125
		100.90$	55
150	100$
225	99.90$
580	99.85$
654	99.73$
350	99.52$
335	99.48$
1500	99.43$
1548	99.30$
2500	99.25$
3000	99.15$

a) The price of a market order to sell 100 shares.

b) The price of a market order to buy 200 shares

c) The effective bid-ask spread as the last order is executed .

plz explain each step