What is the value for tu=4x-6

Which of the following is the shape of a cross section of the figure shown below

What sums are equal to 6/12? choose all answers that are correct a.6/12+6/12+6/12+6/12+6/12+6/12 b.2/12+1/12+1/12+2/12 c.5/12+1/12 d.1/12+1/12+1/12+3/12 plz : )

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20