print value on report

http://i68.tinypic.com/fuaujc.png

i have this report 

i fill name , profession , address and Date from my database 

i have problem to fill the part of Tasks conclusion  which  based on tasks 1,2,3 and 4

if the four tasks with value  "A "  the output will be  Excellent

if task 1 , 2,3  "A"  the output will be  Very good 

so please any help at  this