Please answer all questions completely, this is the second time that I post these questions to get the answers, thank you!

solve and choose the correct option for each quation 1) suppose that we have a Haingular mattix A such that an = 2, 922 = 3, 932 = 4, and we have I to be the 3x3 identity mattix. Then IA - Il equals : the above Q 2 ) suppose that we have two vectors UandV, such that u, U be vectors in RS both have lenght of I unit and the angle between u and v is 11 , then ( U - 2V ) . ( 24 - V) = ? a) - 1 bJ o c) 1 d ) 4- 353 e ) none of the above.Q3) suppose we have u, v and w vectors in R' such that 1/ 4- VII = 1 = (1ull = 11 VIl, then 1/ 20 - 34/1 = ? the above 14 ) Find an equation of the Plane Passing through the Points All, 2, 3) B ( 2, 3, 1 ) , ( ( 3, 1, 2 ) . a ) x - y tz = 2 b ) x + y - 7 = 0 ( ) x + y + z = 6 d ) x - y - z = o ( ) None of the above