Would you please help me with these questions.

1)

Find v x u for the given vectors. u =2 1 -3 j + k, v = -31 +2j +4k v x u - ai +bj +ck where a b - and c - (Type exact values, in simplified form, using fractions and radicals as needed. Type 1, - 1, or 0 when appropriate, even though these values are not usually shown explicitly when writing a vector in terms of its components.)Find u . (v x w) for the given vectors. u =2i - j +3 k, v= -2 i +4 j + 2 k, and w = 4 i + j + k Select the correct choice below and fill in the answer box(es) within your choice. O A. The answer is a vector. u . (v x w) - ai + bj + ck where a = and c = (Type integers or simplified fractions. ) O B. The answer is a scalar. u . (v x w) = (Type an integer or a simplified fraction.)Find (a) vxw, (b) wxv, and (c) vxv for the two given vectors. v = i- 2j + 3k, w =i- 4j - 3k (a) vxw = ai + bj + ck where a = b = and c = (Type exact values, in simplified form, using fractions and radicals as needed. Type 1, - 1, or 0 when appropriate, even though these values are not usually shown explicitly when writing a vector in terms of its components.)