An opaque horizontal plate is well insulated on the edges and the lower surface. The irradiation on the plate is 3000 W/m^2, of which 500 W/m^2 is reflected. The plate has a uniform temperature of 700K and has an emissive power of 5000 W/m^2. Determine the a) total emissivity b) absorptivity of the plate C) reflectivity also d) transmtivity.