this is a heat transfere question ..solve 2 A&B please

(1): prove the dimensionless temperaru (2): A: For hollow cylinder (ri=2cm,r0=3cm and kw=380w/mC) with different uniform heat generation boundary conditions on the inner and outer surfaces and uniform heat generation 11300w/m3 ) through the body. Show that the temperature is cons B: If a steam flows inside above cylinder with 105 oC hair at 25C,h=50 outside surface is maintained at jp hglhdj, hseC and exposed to air at mection only, w/m2 oC. Neglecting the storage energy and heat flow into radial direction only, respectively and draw the temperature distribution diagram