Question 980136
The premises are the columns marked in light blue. The conclusion is the last column. 


<img src = "http://i150.photobucket.com/albums/s91/jim_thompson5910/7-18-2015%204-27-43%20PM_zpsblmz5qtr.png">


Notice how the second row and the sixth row have


premise [N v ~(N v P)] -> ~R being true (T)
premise P being true (T)
conclusion R being false (F)


These rows have all premises true with a false conclusion. So this means that the argument is <font color="red">invalid</font>