正态分布百分位数

def solve():
    import pandas as pd
    import numpy as np
    import matplotlib.pyplot as plt
    from scipy.stats import norm
    url = '____'
    df = pd.read_csv(____)
    mu, sig = df['____'].mean(), df['____'].std()
    percentiles = [____,____,____,____]
    for p in percentiles:
        print(____)
    x = np.linspace(____)
    y = norm.pdf(____)
    plt.plot(____)
    for p in percentiles:
        val = norm.ppf(____)
        plt.axvline(____)
        plt.text(____)
    plt.xlabel(____); plt.ylabel(____); plt.title(____)
    plt.tight_layout(); plt.show()