Jupiter generates a heat flux of about 7 watts per square meter of surface at the 1 bar level. The decay of 40K and other radiogenic isotopes produces 4.8 × 10^－12Wkg^－1 of heat in the Earth today. If Jupiter has a core of which 8M⊕ (i.e. 8 Earth-masses) is rocky materials, what would be the rate of radiogenic heat generation in the core of Jupiter, assuming that the core is of similar composition to the Earth? Compare this with the observed heat flux.