i Find the value of p, such that the following three vectors are coplanar A=2i+j=4k,B=3i+2j+pk and c=i+4j+2k

ii Determine the unit tangent vector at the point (2,4,3) for the curve with parametric equations x=2(u^2),y=u=3 and=4(u^2)-u

iii Find the direction cosines of each of the following vectors, and hence determine the angle between them c=3i+4j+5k and D=i+2j-3k

iv Find the i) scalar product ii) vector product, of the following vectors: p=3i-2j+4k and Q=i+5j-2k