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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def acquisition_function_withGradients(self, x):
 """ Returns the acquisition function and its its gradient at x. """

        aqu_x      = self.acquisition_function(x)
        aqu_x_grad = self.d_acquisition_function(x)
        return aqu_x, aqu_x_grad