The heat flux = 1.830b * 10 ^ 5 w/m^2

materials are: material 1: copper

material 2: stainless steel

material 3 (insulating) : plastic

T1 = 60 C

T2= 10 C

h1 = 80 w/m^2.K

h2= 40 w/m^2.K

L1 = 0.02 m

L2 = 0.03 m

if q" is 32% of the original q" listed, what should the thickness of the insulating material (3) be?