Debugging xv6 using gdb Lab instructions. Continue from our previous lab, compile xv6. run make qemu-gdb. Then, in another window, run gdb from the xv6 directory, and then run che command source .gdbinit Now. in the gdb window run the following (shown in bold font) Egdb) b exec Cgdb) c Cgdb) c Cgdb) c Answer the following question. 1. What does command "b" do? 2. What does command "c" do? 3. What do you see by executing the commends (b, c, c, c)? Why do you see that? REFERENCES It is possible to use GDB with xv6. To do this instead of running make qemu or make qemu- nox,run make qemu-gdb or make qemu-nox-gdb respectively. Then, in another window, run gdb from the xv6 directory, and then run the command source .gdbinit within GDB. Then, within GDB, you can set breakpoints with break function_name (and various similar commands) and start execution of the OS with continue.

Write the following statement in symbolic form and construct a truth table.         It is false that Mr. Chen is the president or that Ms. Chow is not the            treasurer.

The questions in this group refer to the following three relations: SALESPERSON (Name, Age, Salary) ORDER (Number, Customer Name, Salesperson Name, Amount) CUSTOMER (Name, City, Industry Type) SALESPERSON Name Age Salary Abel 63 120,000 Baker 38 42,000 Jones 26 36,000 Murphy 42 50,000 Zenith 59 118,000 Kobad 27 34,000 ORDER Number CustName SalespersonName Amount 100 Abernathy Construction Zenith 560 200 Abernathy Construction Jones 1800 300 Manchester Lumber Abel 480 400 Amalgamated Housing Abel 2500 500 Abernathy Construction Murphy 6000 600 Tri-City Builders Abel 700 700 Manchester Lumber Jones 150 CUSTOMER Name City Industry Type Abernathy Construction Willow B Manchester Lumber Manchester F Tri-City Builders Memphis B Amalgamated Housing Memphis B Use the data in those tables and show the SQL…

QuestionsWrite SQL statements that will answer the following four questions based onthe following tables.1. Find suppliers (company name, country and city) whose country isAustralia or whose city is Paris.2. Compute the extended price for each order. Extended price is obtained bymultiplying unit price by quantity (from Order Details table). Show order id,product name and extended price. Sort the results by product name inascending order.3. List products ids and product names of discontinued confection productsthat are still held in stock. (Confection products are those that have"Confections" as category name.)4. Find the total quantity of each product ordered within each category.Display the category id, category name, product name and total quantity.     Hints:The MONTH(DateField) function can be used to evaluate criteria about the month portion of adate field.The FORMAT(DateField) function can be used to return the month names.The SELECT statement has several options that can be used…