Problem #$4$: Create a new function file called modify$\_$matrix.m$.$ Then copy and paste the contents of the

create$\_$matrix.m file into this new file, and change the name of the function in the first line to

modify$\_$matrix $($instead of create$\_$matrix$).$

By further modifying this new file, write a function that will output a matrix A obtained by modifying an input

matrix $B$ in the following way:

If an entry in $B$ is greater than or equal to zero then multiply it by $5$

If an entry in $B$ is less than zero then add $2$ to it$.$

Then use this new function to create a matrix A obtained by modifying the following $3030$ matrix $B($which

you can copy and paste directly into Matlab$).$ Then find the determinant of $A$

Warning! When Matlab first reads a function from a file, it stores the function in memory and then uses that

stored function instead of reading the file in subsequent calls to the function. Therefore if after calling a function

vou then make changes to that file those changes will not be made when vou call the function again unless vouCreate a new function file called modify$\_$matrix.m$.$ Then copy and paste the contents of the create$\_$matrix.m file into this new file, and change the name of the function in the first line to modify$\_$matrix $($instead of create$\_$matrix$).$

By further modifying this new file, write a function that will output a matrix A obtained by modifying an input matrix B in the following way:

$1.$ If an entry in B is greater than or equal to zero then multiply it by $5$

$2.$ If an entry in B is less than zero then add $2$ to it$.$

Then use this new function to create a matrix A obtained by modifying the following $30\backslash$times $30$ matrix B $($which you can copy and paste directly into Matlab$).$ Then find the determinant of A

B $=[7-7-3259-9-442-66-719-2-731022-91-103-2410-4-5$;$-30-6-0-9-8-6-26-8-3-7-2-5-08-17-6-888-6-6-2344-0-5$;$-930-1-6-9817328-68-194-7-8-0-2-3-122-9-138-3$;$993-0-174-1-5-2-06-24556-22-110-6-51-2-8-3-61-8$;$7-4-74310-41-27510-11-7451010-55-867-6-8-9463$;$12-570-1-47-5-9-52-5-8-446-9-70-5-02444110-6-3$;$7-77-5768296-79-1-014-278-648-61-4-02-10-17$;$4-9-7-8-9-3-1-2-6-10-8-10104-61-8-7-552-68-2-796-17-1$;$-2-5-53-931-4-4-41-0-2-94-9-5-3-8-5389-82-1-6-1-72$;$-6-9-0-5-15-992-6-9231-476423-37-5-3-10-1-4-8-97$;$-5-10-6-724-135-34-3-988-8-4-33-8-2-19-438-597-4$;$-9-2-4-42759-0-97-92-1-5-3-7-41-0-15-98108-0295$;$-2-3-106-1-675-6-2-41-48-26-30-961-93-51-5-8-296$;$-606079-6-8381949-8-1033-501-87-73-65-4-8-6$;$-1-0-6-5-2-0-4-8-794-6-84611-853919-96713-77$;$-611-6-311-5-61-1-53-91-5-1959555-70-26-1-86$;$7-10-10-2-2-2-4-220-9-49109-7-5-29526-10-2-5310-9-46$;$-8-1049-13-3-40-693-19-6763-4610-939-397-9-75$;$-6-4-75-9-8-697-6096296-2-73-53-6-852-368-27$;