Should commercial buildings be required to use alternative fuel sources to fulfill a minimum of 25% of their energy needs?

Will you chech and finish these for me, because i am stumped with them.

Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.