Only solve for 200 degrees celsius

Cu - Zn Composition (at % Zn) 20 40 60 80 1200 100 12200 2000 +L Liquid 1000 1800 B+ YA 1600 800 1400 B L Temperature (C) Temperature (F) + 8+L 1200 8 + > 8 600 8+ 1000 7+L * 7 800 8 400 7+ 77 8 + + + 8 8 600 1 ! 200 0 0 (Cu) 20 40 60 80 400 100 (Zn) Composition (wt% Zn) Problem 2 What phases and mass fractions of each phase are present at an alloy of composition 52 wt. % Zn - 48 wt. % Cu is cooled? 200 C as