Chemistry - Percent Composition ~?

A piece of plumber's solder weighing 3.00 g was dissolved in dilute nitric acid, then treated with dilute H2SO4. This precipitated the lead as PbSO4, which after washing and drying weighed 2.93g. The solution was then neutralized to precipitate stannic acid, which was decomposed by heating, yielding 1.27g SnO2. What is the ysis of the solder as % Pb and % Sn?