What are the dimensions if the poster is enlarged by a factor of five over two ?

7.5 ft by 30 ft
15 ft by 60 ft
1.5 ft by 6 ft
15 ft by 6 ft

What are the dimensions if the poster is enlarged by a factor of five over two 75 ft by 30 ft 15 ft by 60 ft 15 ft by 6 ft 15 ft by 6 ft class=