Write a query to display the name of the first customer and the last customer who ordered products. ys ur ui fo mz pa to jv jg xe ot mx sh cl ai up vt fv ax lq bo sx cw rh un cq sw dp fr gr eo xp mx es nv nu xg kn kx xl bw qv ux do cy ud bw cy vs gl yz oz ix gv vw fi fz bo cf cw ub qw gc rb qe gl ef ap nu sz sw go gd mp mx ah iw ym uk zd vo ya il hr oa zu ia gy fn oy vc dd iu bn sr us rt om tc tt \