1) look at the following code.double value = 29.7;double *ptr = &value;write a cout statement that uses the ptr vaiable to display the contents of the value variable

2) look at the following array definitionint set [10];Write a statement using pointer notation that stores the valu 99 in set [7];

3) Write the definition of ptr, a pointerr to a constant int.

4)write athe definition of ptr, a constant pointer to an int.