Write a complete program that will do the following in C++ a.Declare an integer vector without specifying any size. b.Insert the values 5,10,15, 8, 4 into the vector c.Multiply the elements of vector...

Write acomplete
program that will do the following in C++

a.Declare an integer vector without specifying any size.

b.Insert the values 5,10,15, 8, 4 into the vector

c.Multiply the elements of vector using a for loop.

d.Print the product of all the elements of the vector.