http://www.stat.ucla.edu/~dinov/courses_students.html 
 
(9/26)(xy+y)^{2} 
0 ≤x ≤2; 0 ≤ y ≤ 1 

f(x; y) 
= 
 


 
0, 
otherwise 
93 
85 
99 
67 
79 
91 
89 
95 
93 
84 
87 
90 