Y1=sqrt(7^2-(x-0)^2)–1.5
Y2=sqrt(7^2–(x-17)^2)–1.5
Y3=sqrt(7^2–(x+17)^2)–1.5

Y4=7
Y14=10.75
Y15=11.75

Y5=-abs(sin(x)/1.5)-0.5
Y6=-abs(sin(x-1.3)/1.5)-2
Y7=-abs(sin(x)/1.5)-3.5

Y8=sqrt(3.5^2-(x-4)^2)+6.5
Y9=sqrt(3.5^2-(x+4)^2)+6.5
Y10=sqrt(3.5^2-(x+12)^2)+6.5
Y11=sqrt(3.5^2-(x-12)^2)+6.5
Y12=sqrt(3.5^2-(x+20)^2)+6.5
Y13=sqrt(3.5^2-(x-20)^2)+6.5