Jaime works in a daycare setting where she can observe different types of infant temperament. In her psychology class right now, the topic is temperament according to Chess and Thomas. Jaime cares for Evan, who is always in a positive mood and quickly establishes regular routines. She also cares for Isaac, who cries a lot, doesn't take to new routines, and is slow to adapt. Jaime thinks that Evan is a(n) _________ child and Isaac is a(n) __________ child.