Consider p is the density function of an ensemble. This system is said to be in stationary state if, (a) T=0 @ θρ at =0 (b) др (c) =0 OV (d) =0 at A star with surface temperature 20,000K emits energy at a rate of 2.74x10" W. Calculate the peak-intensity wavelength and radius of the star. (a) 1.63x10 m, 1.25×10 m (b) 1.45x10 m, 1.55x10' m (c) 1.49x 10 m, 1.01×10' m (d) 1.59x10 m, 1.38×10° m