Coefficient of volume expansion of the glass???

A glass flask whose volume is 1000 cm^3 at a temperature of 0.500 C is completely filled with mercury at the same temperature. When the flask and mercury are warmed together to a temperature of 52.0C, a volume of 8.00 cm^3 of mercury overflows the flask.
If the coefficient of volume expansion of mercury is = 1.80?0?4 , compute , the coefficient of volume expansion of the glass.