Cost Value is not changing. I have checked for hard code but not found any.

None of the values of W1, W2, b1 etc matching

please help

```
Cost after iteration 0: 0.689099
Cost after iteration 1000: 0.689099
Cost after iteration 2000: 0.689099
Cost after iteration 3000: 0.689099
Cost after iteration 4000: 0.689099
Cost after iteration 5000: 0.689099
Cost after iteration 6000: 0.689099
Cost after iteration 7000: 0.689099
Cost after iteration 8000: 0.689099
Cost after iteration 9000: 0.689099
W1 = [[-0.00643025 0.01936718]
[-0.02410458 0.03978052]
[-0.01653973 -0.02096177]
[ 0.01046864 -0.05990141]]
b1 = [[-1.02420756e-06]
[ 1.27373948e-05]
[ 8.32996807e-07]
[-3.20136836e-06]]
W2 = [[-0.01041081 -0.04463285 0.01758031 0.04747113]]
b2 = [[0.00010457]]
---------------------------------------------------------------------------
AssertionError Traceback (most recent call last)
<ipython-input-55-6d3d4c22ad68> in <module>
7 print("b2 = " + str(parameters["b2"]))
8
----> 9 nn_model_test(nn_model)
~/work/release/W3A1/public_tests.py in nn_model_test(target)
273 assert output["b2"].shape == expected_output["b2"].shape, f"Wrong shape for b2."
274
--> 275 assert np.allclose(output["W1"], expected_output["W1"]), "Wrong values for W1"
276 assert np.allclose(output["b1"], expected_output["b1"]), "Wrong values for b1"
277 assert np.allclose(output["W2"], expected_output["W2"]), "Wrong values for W2"
AssertionError: Wrong values for W1
```