Assume a closed magma chamber in which 30wt% of the original magma has crystallized. The solid phases are compqsed of 10wt% of olivine and 20wt% plagioclase. Weight % SiOz of the olivine and plagioclase is 38% and 60% respectively, whereas Si02 content of remaining melt is 45wt%. will be the SiO2 content of the original basaltic melt? (answer upto 1 place of decimal).