Help chemistry question?

a 2.764g sample containing only iron and aluminum metal was treated with acid to form Al+3 and Fe+2. The sample ws then titrated with potium dichromate solution (only the Fe(II) will react with the dichromate). the same was found to be equivalent to 14.36 ml of 0.0845 M potium dichromate solution. what is the % of Al in the sample?