In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: in a rectangular coordinate system , what is the area of a quadrilateral whose vertices have the coordinates ( 3 , - 1 ) , ( 3 , 8 ) , ( 12 , 2 ) , ( 12 , - 7 ) ? 
Options: a ) 69 , b ) 75 , c ) 81 , d ) 87 , e ) 93
c

Problem: if the length of the sides of two cubes are in the ratio 4 : 1 , what is the ratio of their total surface area ? 
Options: ['a ) 4 : 1', 'b ) 6 : 1', 'c ) 8 : 1', 'd ) 16 : 1', 'e ) 64 : 1']
d

Problem: a semicircular shaped window has diameter of 63 cm . its perimeter equals 
Options: ['a ) 162', 'b ) 766', 'c ) 298', 'd ) 277', 'e ) 198']

a