Let the present age of the son be x years.
Then, the present age of the father is 6x years.
Four years hence, the age of the father will be 6x + 4 years.
Four years hence, the age of the son will be x + 4 years.
It is given that four years hence, the age of the father will be four times his son's age.
Therefore,
6x + 4 = 4(x + 4)
6x + 4 = 4x + 16
2x = 12
x = 6
Therefore, the present ages of the son and the father are 6 years and 36 years respectively.
So the answer is (6, 36)