Evaluate the following integral. 54-2y/3 12-2y-3z ITT 10 1 dx dz dy Find the average temperature in the box D = {(x,y,z): 0sxs In 2,0 sys In 4, 0szs In 8) with a temperature distribution of T(x,y,z) = 70ex-y-z The average temperature is (Type an exact answer.)