ee 1 1/2 c ec 1 c e 200 200 e 3 e 100 50 e 1/4 1 . c ce 1/2 . 1 e
c ee e e. ee 1 . c. c c c, e c c, c, , e ec. c ec, eee. e c c c, e ec e 200° 20 (c ee c). e c cc c ce (e c c e).