please help me to fix my graph to see the other line graph of the graph

import numpy as np

import matplotlib.pyplot as plt

temperature$\_$range $=$ np$.$arange$(14,26,1)$

def Low $($x$)$:

return np$.$maximum$(0,$ np$.$minimum$((14-$ x$)/4,1))$

def Medium $($x$)$:

return np$.$maximum$(0,$ np$.$minimum$($np$.$minimum$(($x $-18)/2,(18-$ x$)/2),1))$

def High $($x$)$:

return np$.$maximum$(0,$ np$.$minimum$($np$.$minimum$(($x $-22)/2,(22-$ x$)/2),1))$

def Very$\_$high$($x$)$:

return np$.$maximum$(0,$ np$.$minimum$($np$.$minimum$(($x $-26)/2,(26-$ x$)/2),1))$

plt$.$figure$($figsize$=(10,4))$

plt$.$plot$($temperature$\_$range, Low$($temperature$\_$range$),$ label$=$"Low"$)$

plt$.$plot$($temperature$\_$range, Medium$($temperature$\_$range$),$ label$=$"Medium"$)$

plt$.$plot$($temperature$\_$range, High$($temperature$\_$range$),$ label$=$"High"$)$

plt$.$plot$($temperature$\_$range, Very$\_$high$($temperature$\_$range$),$ label$=$"Very high"$)$

plt$.$title$("$Fan speed $")$

plt$.$xlabel$("")$

plt$.$ylabel$("$Degree of Membership"$)$

plt$.$legend$()$

plt$.$show$()$

Fan speed