A) Write a small C program that copies data from a file A to a file B byte-by-byte. For different file sizes 1MB - 128MB (doubling the file size in each step), record the time your program requires to complete the file copy when using read() and write() system calls. Generate a graph that depicts the program performance. Use the Unix time(1) command. B) Repeat this experiment, but instead of copying individual bytes, use larger size portions of the file that are copied in each read() and write() system call. For instance, you may choose to copy the file in chunks of 2, 4, 8, ..., 1024 byte units. Use a 128MB file for each test. Generate a performance graph of transfer size vs execution time and interpret your experimental results. What do you observe? Why do you think the system shows the observed behavior? Note: For these programs, it is imperative that file A and file B are located on the local disk. On Linux, the /tmp directory is located on the local file system. You must submit your program, the graphs of the corresponding experiments, and your analysis. Failure to follow this direction will invalidate your results as your home directory is on a network mounted drive and I/O times are influenced by network load.

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Task 1: ' The Car Maintenance team wanted to ensure that the default price of the maintenance actions should not be empty and 0 instead if not specified. Alter the MAINTENANCE_TYPES table created in Chapter 8, Activity 1 to set the default MAINTENANCE_PRICE to 0.   ANSWER IN MYSQL PLEASE

Task 6: The StayWell marketing team wants to send mail to all residents. You need to return the first name and surname of all the residents combined as NAME, with their addresses named ADDRESS. However, the address should be retrieved from the PROPERTY table for residents. Task   Retrieve the mailing address (first name, surname, and address) for each resident.   Task 7: The development team wants to add new residents and new service requests to StayWell without checking the latest IDs and manually incrementing it. Therefore, you need to alter the RESIDENTS table and change the RESIDENT_ID field to an auto-incremented field of type SMALLINT.     Alter the RESIDENTS table and change the ID field to an auto-incremented field. Task 8: The Colombia City office of StayWell indicated that there is a new tenant by the name of Yigit Yilmaz staying at the property with an ID of 13. You need to include this new resident in the RESIDENTS table. Task   Add Yigit…