a) Give examples showing how the following could be achieved in an ARM assembly language program: (0) Creating a constant (ii) Creating and initialising a variable in memory In each case state why your example is an appropriate method. b) Write a short section of ARM assembly language code that will read and print out each character of a string in turn. The last character of the string should be followed by a byte with the numerical value zero, i.e. the string is null- terminated. You should assume that the Supervisor Call SVC O prints the character in RO