tolongin aku kakaaaa

a. B={ b,c,d,f,g,h,j,k,l,m,n,p,q,r,s,t,v,w,x,y,z}
b. A={1,2,3,4,5,6,7,8,9}
c. K={3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99}
d. C={1,2,3,4,5,6,7,8,9,10,11...}