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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 build_latent_variables(self):
 """ Builds latent variables for this kernel Returns - A list of lists (each sub-list contains latent variable information) """

        lvs_to_build = []
        lvs_to_build.append(['Noise Sigma^2', fam.Flat(transform='exp'), fam.Normal(0,3), -1.0])
        for lag in range(self.X.shape[1]):
            lvs_to_build.append(['l lag' + str(lag+1), fam.FLat(transform='exp'), fam.Normal(0,3), -1.0])
        lvs_to_build.append(['tau', fam.Flat(transform='exp'), fam.Normal(0,3), -1.0])
        return lvs_to_build