$1.$ Write a program to store five consecutive bytes of data into the data segment. The first data element should be $1$ and the data should be stored starting from offset position $10$H$.2.$ Write a program to exchange the contents of AL and BL using the stacks. The initial values of AL should have $4$CH and BL should have $55$H$.3.$ For the above programs, write the physical addresses of all the segment registers, as well as the logical addresses. $4.$ Write a program that loads two numbers from the data segment, adds them together, and stores the result in the data segment. After that, subtracts the second number from the first and stores the result. $($Hint: You need to open the $$vars$$ window of emu$8086$ to follow the contents of the variables.$)$