please complete the code and show the result (question written in comment section) def approx(expected): import pytest return pytest.approx(expected, 1e-2, 1e-4) # Determine whether the heart rate is normal for age. # upto 17 years: 70-100 # 18 years and above:60-100 def is_normal(heart_rate, age): pass def test_is_normal(): assert is_normal(100, 15) assert not is_normal(65, 15) assert is_normal(60, 18) assert not is_normal(101, 18) assert not is_normal(59, 50) # Scale an input 2-dimensional vector by c. def scale(c, v): pass def test_scale(): assert scale(0.0, (10.0, 10.0)) == approx((0, 0)) assert scale(100.0, (0.0, 0.0)) == approx((0, 0)) assert scale(2.0, (3.0, 4.0)) == approx((6, 8))