Q$2($f$)(16$ marks$)$

The manager of the restaurant is concerned about security so the developer has added a hashing algorithm to

encrypt the names before they are stored. This code is implemented in the function below:

def enc$($t$,$c$)$:

e $=\text{'}\text{'}$

for ch in t:

if $\text{'}$a$\text{'}<=$ ch $<=\text{'}$z$\text{'}$:

e $=$ e $+$ c$[$ord$($ch$)-$ ord$(\text{'}$a$\text{'})]$

else:

In $[]$:

#Write your answer here

In $[]$:

bookings$\_$dict $=\{7$: $(\text{'}$Howson$\text{'},0,0),\backslash$

$8$: $(\text{'}$Howson$\text{'},0,0),9$: $(\text{'}$Linson$\text{'},0,0),\backslash$

$10$: $(\text{'}$Linson$\text{'},0,0),12$: $(\text{'}$Hackett$\text{'},0,1),\backslash$

$13$: $(\text{'}$Hackett$\text{'},0,1),14$: $(\text{'}$Hackett$\text{'},0,1)\}$

#Write your answer here

#Run this code to ensure your code works

$\%$run $-$i m$269\_$util

test$\_$table $=[$

$[\text{'}$Single table',bookings$\_$dict,$1,$"Linson"$],$

$[\text{'}$Four tables',bookings$\_$dict,$4,$"Hackett"$],$

$]$

test$($#your$\_$function$\_$name, test$\_$table$)$

e $=$ e $+$ ch

return e

Q$2($f$)($i$)(8$ marks$)$

The code above breaks a number of the guidance rules that you have been taught about in this module.

Identify four distinct rules that have been broken and explain why breaking this rule may be a problem.

Write your answer here

Q$2($f$)($ii$)(8$ marks$)$

Identify the complexity of the code in Q$2($f$)$ by name and in terms of Big Theta $(\backslash$Theta $).($Assume that 'ord' has

constant complexity.$)$ Explain and justify your reasoning.

Write your answer here

Submit this TMA by zipping together the notebook along with all of the helper and data files you have used, and

submitting your $.$zip file using the online TMA$/$EMA service