Write a program that defines the named constant PI, const double PI3.14159;, which stores the value of Tt. The program should use PI and the functions listed in Table 6-1 to accomplish the following Output the value of VT. a. b Prompt the user to input the value ofa double variable r,which stores the radius of a sphere. The program then outputs the following i. The value of 4.0Tr2, which is the surface area of the sphere.
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