PUTRAJAYA, May 16 — The Court of Appeal today dismissed applications by two former students, a boy and a girl, seeking a stay of execution and bail pending the hearing of their appeal.They had appealed against a High Court decision that found them guilty of murder and ordered them to be detained at the pleasure of the Sultan of Perak.Justice Datuk Ahmad Kamal Md Shahid, who chaired a three-member bench, ruled that the reasons advanced by both ap…