Greeting All, please assist with the below. Thanks.

The spectral power density of a solar simulator is given by:
P(λ)=7.5∗1015λ−2.25∗109 [Wm^-2m^-1] for 300nm<λ<500nm

P(λ)=2.25∗109−1.5∗1015λ [Wm^-2m^-1] for 500nm<λ<1500nm

Where the wavelength λ is expressed in meters.

Calculate the irradiation I of the solar simulator (in Wm−2 )

What is the photon flux of the solar simulator (in 1021m−2s−1)?