Please check all work in matlab and correct all syntax error or any other error that prevents it from running.

$\%\%$ Question $4$

$\%$ generate two vectors consisting digits from $0$ to $9$

vec$1=$randi$(9,1,20)$; $\%$ row vector of length $20$ consisting of digits between $0$ to $9$

vec$2=$randi$(9,1,20)$;

add$=[]$; $\%$ initialize to an empty vector

first$=0$; $\%$ initialized to zero$($ this is the digit will be obtained after addition of two

$\%$ integers eg: $5+7=12,$then first$=1)$

$\%$ loop starts in revers i$.$e $20,19,18,..,1$

for i$=20$:$-1$:$1$

$\%$ add the two numbers of the ith location from vec$1$ and vec$2$

a$=$vec$1($i$)+$vec$2($i$)+$first;

$\%$ now convert the number a into a string array

a$\_$str$=$num$2$str$($a$)$;

$\%$ check if i$==1,$suppose the first digit in vec$1$ and vec$2$ are $5$ and $6$

$\%$ then $5+7=12,$if you don't use this conditional then

$\%$ only $2$ wll be stored into the vector add

if i$==1$

add$=[$a add$]$;

else

$\%$ check if a$\_$str is of length $2$

if length$($a$\_$str$)==2$

$\%$ then it's a two digit number $,$so get the first digit from left

first$=$a$\_$str$(1)$;

$\%$ convert back first into a number

first$=$str$2$double$($first$)$;

second$=$a$\_$str$(2)$;

second$=$str$2$double$($second$)$;

add$=[$second add$]$; $\%$ store into the vector add

else

add$=[$a add$]$;

first$=0$; $\%$ change first back to $0$

end

end

end

$\%$ one more thing to do is that check if the first number in the vector add

$\%$ is of two digit

if length$($num$2$str$($add$(1)))==2$

str$=$num$2$str$($add$(1))$;

add$=[$str$2$double$($str$(1))$ str$2$double$($str$(2))$ add$(2$:end$)]$; $\%$ this is done

$\%$ to have space

$\%$ between $1$ and $2$

$\%$ as if add$(1)=12$

$\%$ display to the command window

$\%$ space taken just to have a good formating output

disp$([\text{'}\text{'},$num$2$str$($vec$1)])\%[]$ use to concatenate strings

disp$([\text{'}\text{'},$num$2$str$($vec$2)])$

disp$(\text{'}+\text{'})$

disp$("-------------------------------------------------------------")$

disp$($num$2$str$($add$))$

else

disp$($num$2$str$($vec$1))$

disp$($num$2$str$($vec$2))$

disp$(\text{'}+\text{'})$

disp$("----------------------------------------------------------")$

disp$($num$2$str$($add$))$

end

$\%\%$ Question $5$

clear

fprintf$(\text{'}$

welcome to guess my number game'$)$

disp$(\text{'}\text{'})$

a $=$ input$(\text{'}$

Please tell me you nice Name : $\text{'},\text{'}$s$\text{'})$;

fprintf$(\text{'}$

$\backslash$t Welcome to the game $\%$s$\text{'},$a$)$

disp$(\text{'}\text{'})$;

m$1=1$;

while m$1==1$

disp$(\text{'}\text{'})$;

disp$(\text{'}$Choose the level of playing:$\text{'})$

disp$(\text{'}1)1-10\text{'})$

disp$(\text{'}2)1-100\text{'})$

disp$(\text{'}\text{'})$

o $=$ input$(\text{'}$enter the level you want to play: $\text{'})$;

disp$(\text{'}\text{'})$

switch o

case $1$

n $=10$;

case $2$

n $=100$;

end

b $=$ randperm$($n$)$;

index $=$ randperm$($length$($b$))$;

r $=$ b$($index$(1))$;

m$2=1$;

count $=0$;

while m$2==1$

guess$=\text{'}$r$\text{'}$;

while guess $==\text{'}$r$\text{'}$

guess $=$ input$(\text{'}$Input your guess: $\text{'},\text{'}$s$\text{'})$;

end

guess $=$ str$2$double$($guess$)$;

if $($guess $==$ r$)$

disp$(\text{'}\text{'})$

fprintf$(\text{'}$Correct$!$ My secret number was: $\%$i

$\text{'},$r$)$

m$2=2$;

elseif $($guess $>$ n$)$

disp$(\text{'}\text{'})$

fprintf$(\text{'}$Too high, please less than $\%$i

$\text{'},$n$)$

disp$(\text{'}\text{'})$

elseif $($g $<1)$

disp$(\text{'}\text{'})$

disp$(\text{'}$Too low, please more than $\%$i

$\text{'},$n$)$

disp$(\text{'}\text{'})$

elseif $($guess $>$ r$)$

disp$(\text{'}$Lower$\text{'})$

else $,($guess $<$ r$)$;

disp$(\text{'}$Higher$\text{'})$

end

count $=$ count$+1$;

end

disp$(\text{'}\text{'})$

fprintf$(\text{'}$Guesses needed to find my secret number: $\%$i

$\text{'},$c$)$

disp$(\text{'}\text{'})$

if $($count $==1)$

disp$(\text{'}$marvallous$\text{'})$

elseif $($count $>=2$ && count $<0\mathrm{.}5*$n$)$

disp$(\text{'}$excellent$\text{'})$

elseif $($count $==0\mathrm{.}5*$n$)$

disp$(\text{'}$Avg$\text{'})$

elseif $($count $>0\mathrm{.}5*$n && count $<=0\mathrm{.}8*$n$)$

disp$(\text{'}$its very poor'$)$

else $,($count $>0\mathrm{.}8*$n$)$;

disp$(\text{'}$better luck next time $!\text{'})$

end

disp$(\text{'}\text{'})$

p $=$ input$(\text{'}$will u wish to play again? $($yes$/$no$)$: $\text{'},\text{'}$s$\text{'})$;

if p $==\text{'}$no$\text{'}$

m$1=2$;

end

disp$(\text{'}\text{'})$

fprintf$(\text{'}$Thank you for playing this game $\%$s

$\text{'},$a$)$

end