If GCD(a,b)=1\text{GCD}(a, b) = 1GCD(a,b)=1 and LCM(a,b)=77\text{LCM}(a, b) = 77LCM(a,b)=77, what could be aaa and bbb?
(1,77)(1, 77)(1,77)
(7,11)(7, 11)(7,11)
(11,7)(11, 7)(11,7)
(77,1)(77, 1)(77,1)