Let Array a= (6,1,10, 9, 7, 4, 8, 2, 15 }; After applying quick sort the %3D array after the first iteration is a. a= (4, 1, 2, 10, 7, 9, 8, 6, 15} b. a= { 1, 9, 6, 4, 7, 10, 8, 2, 15 } O c. a= (4, 1, 2, 6, 7, 9, 8, 10, 15} d. a= {6, 1, 2, 4, 7, 9, 8, 10, 15}