What you do is time the mass of the golf ball by how many you have 0.046×12=0.552 then take that away from the final amount to get your answer 1-0.552=0.448 therefore the soccer ball has a mass of 0.448 kg
To get into the pose, stand with your big toes touching and heels apart. Your arms should be down along side the torso, palms facing forward. Your legs should be somewhat close together.