I have a few physics problems I need help with. Please show work or I wont know how to do it. My book has no example problems. 1. Suppose you balance a 5kg ball on the tip of your finger, which has an area of 1 cm^2. Show that the pressure on your finger is 49N/cm^2, which is 490kPa. -For this question I get 500kPa, where is the -10kPa coming from? 2. 6kg piece of metal displaces 1 Liter of water when submerged. Show that the density is 6000kg/m^3 3. Deepest part of a lake has depth of 406m. Show that water pressure at this depth is 3978.8 kPa, and the total pressure there is 4080.1 kPa.