hi

i use under code for plot

but only vertex has been show

help me

with(plots);

with(stats);

f1:=y-

>1.6+(statevalf[icdf,normald](1-(y/2)));>1.6-(statevalf[icdf,normald](1-(y/2)));>1.96+(statevalf[icdf,normald](1-(y/2)));>1.96-(statevalf[icdf,normald](1-(y/2)));{eq1,eq2,eq3,eq4},x=-10..10,y=0.01..1,color=black,

f2:=y-

f3:=y-

f4:=y-

eq1:=x=f1(y);

eq2:=x=f2(y);

eq3:=x=f3(y);

 eq4:=x=f4(y);

 implicitplot(

thickness=3,labels=[x,alpha]);