va rog am nevoie de ajutor dau coroana+ 13 puncte

a. x= 0,1,2,3,4,5
b. x=0,1,2,3,4,5,6
c. x=18,19,20,21,22,23
d. x=7,6,5,4,3,2,1,0
e. x=0,1,2,3
f. x=7