$36.$ Arcturus is a star with a mass of $2\mathrm{.}19$ x $10^30$ kg$,$ a radius of $1\mathrm{.}77$ x $10^10$ m and a

temperature of $4290$ K$.$

Question $1$: What is the total Luminosity $($in Watts$)?$

Question $2$: What is the peak wavelength of this emission $($in nm$)?$