Please explain to me step by step, I would really appreciate it$.$

Some automobile manufacturers are currently working on a ceramic engine block that could operate without a cooling system. Suppose the engine is a rectangular block measuring $45$ cm x $30$ cm x $30$ cm$.$ Suppose the engine generates $40$ KV of power. The engine block is aluminum with an emissivity of $0\mathrm{.}8,$ the engine compartment operates at $150\backslash$deg C$,$ and the convection heat transfer coefficient is $30/$cm$2.$ Suppose the average surface temperature of the engine block$$is$30/$cm$.$