9. The followine nuestions refor to Fig. 2 Fig. 2: Phase diagram for Mg2SiO4SiO2 ot 0.1MPa a) How many components are represented by this phase diagram? b) What is the composition of the eutectic melt at 1543C (circle closest number in wt\% SiO2 in excess of forsterite). c) Write the reaction that occurs upon heating of pure enstatite at 1557C : d) During melting, at which temperature (approximately) will a system with the bulk composition of enstatite be completely molten (no solids left)? What are the last crystals just prior to reaching this point? What is this melting behavior of enstatite called? e) Estimate solidus and liquidus temperatures for a harzburgitic peridotite consisting of 50% forsterite and 50% enstatite