1. (15 points points each) Pointer Variables For question #1, do NOT use the auto keyword. a. (4 pts) Define a class ThreeDPoint having: Three private data members x, y, and z of type double, A default constructor which initializes all three data members to zero, AND A constructor taking three double parameters to initialize the three data members

b. (1 pt) Declare objects pt1 and pt2 of type ThreeDPoint with pt1 initialized to (1.0, 1.0, 2.0) and pt2 initialized to (-1.0, 0.0, 1.0).

c. (2 pts) Do we need to write a copy constructor for the ThreeDPoint class? Why or why not?

d. (2 pts) Write an accessor member function which returns the value of the data member x.

e. (1 pt) Write a mutator member function which takes a single double value and assigns that value to the data member y.

f. (1 pt) Write a statement to declare a pointer called ptPtr to a ThreeDPoint and initialize it to reference the pt1 (which you declared in part b).

g. (1 pt) Use ptPtr and the mutator written in part e to modify pt1s y data member to 4.0. Do NOT use the variable pt1 to access the mutator.

h. (1 pt) Write a statement to declare a vector of ThreeDPoint called myVector such that myVector has an initial size of one. You may assume has already been included.

i. (1 pt) Write a statement using ptPtr which you declared and initialized in part f to assign the value of pt1 to the first position (i.e., index 0) in myVector.

j. (1 pt) Write a statement to assign the value of pt2 to the second position (i.e., index 1) in myVector.