given
A = 5*10^-5 m^2
I = 1 W/m^2
a) we know, Intensity = power/Area
==> Power = Intensity*Area
= 1*5*10^-5
= 5*10^-5 W
b) Energy transefred, E = Power*time taken
= 5*10^-5*3.05*60
= 9.15*10^-3 J
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