CUSIP No.      629377508 SCHEDULE 13D/A

Exhibit A

Transactions In The Company’s Common Stock During The Last 60 Days.

I.      Transactions effected by Sola:

Date of Transaction	Shares Purchased (Sold)			Price Per Share ($)
12/8/2009		(650,000.00	)		24.2
12/9/2009		(670,000.00	)		24.6
12/9/2009		(187,793.00	)		24.1297
12/10/2009		(605,962.00	)		24.3301
12/10/2009		(93,225.00	)		24.18
12/10/2009		(46,612.00	)		24.2275
12/10/2009		(69,919.00	)		24.5504
12/10/2009		(93,225.00	)		24.5021
12/10/2009		44,543.00			24.1668
12/10/2009		(178,950.00	)		24.3897
12/11/2009		(714,663.00	)		24.9776
12/11/2009		(600,000.00	)		25.03
12/14/2009		(84,194.00	)		25.5595
12/21/2009		(50,000.00	)		25.5402
12/21/2009		300,000.00			25.62
12/21/2009		(50,000.00	)		25.6
12/21/2009		(58,732.00	)		25.6031
12/24/2009		(75,000.00	)		24.61
1/7/2010		(460,000.00	)		25.05
1/22/2010		(10,000.00	)		24.87
1/22/2010		(500,000.00	)		25.1514
1/22/2010		(473,643.00	)		25.1077
1/22/2010		(250,000.00	)		25.1077
1/25/2010		(514,526.00	)		25.9938

CUSIP No.      629377508 SCHEDULE 13D/A

II.      Transactions effected by Core:

Date of Transaction	Shares Purchased (Sold)			Price Per Share ($)
12/9/2009		(13,648.00	)		24.1297
12/10/2009		(44,038.00	)		24.3301
12/10/2009		(6,775.00	)		24.18
12/10/2009		(3,388.00	)		24.2275
12/10/2009		(5,081.00	)		24.5504
12/10/2009		(6,775.00	)		24.5021
12/10/2009		3,237.00			24.1668
12/10/2009		(13,005.00	)		24.3897
12/11/2009		(51,937.00	)		24.9776
12/14/2009		(8,590.00	)		25.5595