Question: plots multiple help

hai,

 i want to plot a graph here is my codes and i want the graph like this, can any body help me

 

restart:
with(DEtools):
with(plots):

h(z):=1-(delta2/2)*(1 + Cos(2*(Pi/L1)*(z - d1 - L1))):
K1:=((4/h^4)-(sin(alpha)/F)-h^2+Nb*h^4):
lambda:=int(K1,z=0..1):
F:=0.3:
L1:=0.2:
d1:=0.2:
alpha:=Pi/6:
evalf(lambda);

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