Tolong dijawab soal pada gambar!!!

Y = C + S
Y = pendapatan
C = konsumsi
S = tabungan
y1 = 4m c1 = 3m s1 = 1m
y2 = 6m c2 = 4m s2 = 2m

s - s1 / s2 - s1 = y - y1 / y2 - y1
s - 1 / 2 - 1 = y - 4 / 6 - 4
s - 1 = y - 4 / 2
2(s - 1) = y - 4
2s - 2 = y - 4
2s = y - 4 + 2
2s = y - 2
--------------- ÷ 2
S = 1/2Y - 1m