A block of wood has a mass of 3.52 kg and a density of 606 kg/m3. It is to be loaded by lead so that it will float in water by 0.91 of its volume immersed. The density of lead is 1.13 multiplied by 104 kg/m3.
1. What mass of lead is needed if the lead is on top of the wood?
2. What mass of lead is needed if the lead is attached below the wood?