Estimate the percent difference in the density of iron at STP, and when it is a solid

Question:

Estimate the percent difference in the density of iron at STP, and when it is a solid deep in the Earth where the temperature is 2000oC and under 5000 atm of pressure. Assume the bulk modulus (90 X 109N/m2) and the coefficient of volume expansion do not vary with temperature and are the same as at STP.