Determine the original concentration:
2.5553 g of analyte added to beaker and diluted to 100.0 mL volume. Take 1.05 mL of this solution and add it to a different 9 mL solution bringing it to 10.05 mL total. Work backwards to find the concentration of analyte in the original 2.5553 g of analyte. ( I don't know if you need the molar mass of analyte, but it's 151.163 g/mol.)