EXERCISE 4: Answer the following questions in the spaces provided. It is important to keep the names of the variables as specified so that Blackboard can make the correction properly. In addition, the answer to each question must be accurate, neither more nor less, for the same reason Part 1: Assume that a program has a variable defined as follows: double x = 5.99; How can you refer to the address or location of the variable x in memory? (Write the computational expression that indicates: "address of x"). Answer Part 1: Part 2: Suppose l want to define a pointer variable with name px, which I will use later to point" to the variable x mentioned in part 1: How would you define this px pointer variable? (Note: Just define the variable, do not set it to "point" to x yet Answer Part 2: Part 3: Now take the pointer variable that you just defined in part 2 of this exercise and put it to "point" to the variable x, that is, "save the address of x in the RX variable". Answer Part 3: Part 4: How can you refer to the variable x now, but using the pointer px? Answer Part 4