Please answer this is from Big ideas

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.