Help with surface area, volumes and measures

Hello is there anyone who can help me out with these questions, i would really appreciate it. Thanks

Q1. Work out the surface area of this triangular prism which has a cross-section in the shape of an equilateral triangle of side 6cm and a length of 12cm.

Q2. 8400mm(squared) to cm(squared)

Q3. 2.5cm(cubed) to mm(cubed)

Q4 If a,b,c,r and h represent lengths, use dimensions theory to deduce whether each of these expressions is length,area,volume or none of these.

a) abc

b) 2thirdsbc

c) 3bh + πr

d) 5h(squared)a

e) a + πb

f) ab(squared) + r(squared)

g) a(b+2r)

h) halfπr(squared)h