$"""$

Created on Tue Apr $3021$:$32$:$052024$

@author: bia

$"""$

from scipy import optimize

import numpy as np

import matplotlib.pyplot as plt

import math

Qa $=800\mathrm{.}0$

V $=1\mathrm{.}5$

D $=0\mathrm{.}001$

I $=0\mathrm{.}002$

mass$2$area $=0\mathrm{.}067/0\mathrm{.}018$

sigma $=5\mathrm{.}67$e$-8$

emiss $=0\mathrm{.}95$

k$1=3\mathrm{.}49$

Tair $=35\mathrm{.}0$

x$1=25\mathrm{.}0$

def f$($Tb$)$:

global Qout, C$,$ E$,$ M

M $=0\mathrm{.}0258*$ math.exp $($Tb $/10)*$ mass$2$area

if Tb $<=20$:

E $=0\mathrm{.}27$

if $(($Tb $>20)$ and $($Tb $<36))$:

E $=0\mathrm{.}08*$ math.exp $(0\mathrm{.}0586*$ Tb$)$

if Tb $>=36$:

E $=0\mathrm{.}00297*$ math.exp$(0\mathrm{.}1516*$ Tb$)$

E $=$ E $*$ mass$2$area

Qout $=$ emiss $*$ sigma $*($Tb $+273\mathrm{.}15-$ I $*($M$-$E$))**4$

hc $=$ k$1*$ math. sqrt$($V$)/$ math.sqrt$($D$)$

C $=$ hc $*($Tb $-$ Tair $-$ I $*($M$-$E$))$

return M $-$ E $+$ Qa $-$ Qout $-$ C

global Qout, C$,$ E$,$ M

M $=0\mathrm{.}0258*$ math.exp$($Tb $/10)*$ mass$2$area

if Tb $<=20$:

E $=0\mathrm{.}27$

if $(($Tb $>20)$ and $($Tb $<36))$:

E $=0\mathrm{.}08*$ math.exp$(0\mathrm{.}0586*$ Tb $)$

if Tb $>=36$:

E $=0\mathrm{.}00297*$ math.exp$(0\mathrm{.}1516*$ Tb$)$

E $=$ E $*$ mass$2$area

Qout $=$ emiss $*$ sigma $*($Tb $+273\mathrm{.}15-$ I $*($M$-$E$))**4$

hc $=$ k$1*$ math.sqrt$($V$)/$ math.sqrt $($D$)$

C $=$ hc $*($Tb $-$ Tair $-$ I $*($M$-$E$))$

return M $-$ E $+$ Qa $-$ Qout $-$ C

points $=201$

root $=$ np$.$zeros $($points$)$

wind $=$ np$.$zeros $($points$)$

for i in range $($points$)$:

V $=$ i $/100$

wind$[$i$]=$ V

root$[$i$]=$ optimize.newton$($f$,$ x$1)$

# plot first graph

plt$.$plot$($wind$,$ root$)$

linex $=[0,2]$

liney $=[45,45]$

plt$.$plot $($linex$,$ liney, linesyles $=$ 'dashed'$)$

plt$.$xlabel$(\text{'}$ wind speed $($m$/$s$)\text{'})$

plt$.$ylabel $($ 'Body temp $($deg$-$C$)\text{'})$

plt$.$savefig$("$ Lizard"$)$

plt$.$show$()$

I keep getting this error, please help me correct this so my program can run runfile$(\text{'}/$Users$/$bia$/$Downloads$/$untitled$0.$py$\text{'},$ wdir$=\text{'}/$Users$/$bia$/$Downloads$\text{'})$

File ~$/$Downloads$/$untitled$0.$py:$40$

global Qout, C$,$ E$,$ M

$^$

SyntaxError: name 'Qout' is used prior to global declaration