An inflated balloon of volume 1200 cm3 is filled with helium. What is the magnitude and direction of the net force acting on it? The density of air is 1.29 kg/m3, the density of helium is 0.179 kg/m3, and the mass of the uninflated balloon is 1.0 g. Give your answer as a decimal with 1 significant digit, followed by N (for Newtons), followed by the word up or down. (For example, you might say '0.05 N up' if your answer came out to be 5 x 10-2 N)