Answer
(a) negative
(b) toward
Work Step by Step
(a) As we can see from the table, rubber is shown with four minus sign, so it acquires electrons. We can conclude that it has a negative charge.
(b) We know that if the charge on the balloon is reversed, it will become positive, and the stream of water will deflect toward the balloon. Water is neutral in charge and polar, so it can be repelled or attracted.
