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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 calc_hdev_phase(phase, rate, mj, stride):
 """ main calculation fungtion for HDEV and OHDEV Parameters phase: np.array Phase data in seconds. rate: float The sampling rate for phase or frequency, in Hz mj: int M index value for stride stride: int Size of stride Returns ------- (dev, deverr, n):
 tuple Array of computed values. Notes ----- http://www.leapsecond.com/tools/adev_lib.c 1 N-3 6*tau^2 (N-3m) i=1 N=M+1 phase measurements m is averaging factor NIST SP 1065 eqn (18) and (20) pages 20 and 21 """


    tau0 = 1.0 / float(rate)
    mj = int(mj)
    stride = int(stride)
    d3 = phase[3 * mj::stride]
    d2 = phase[2 * mj::stride]
    d1 = phase[1 * mj::stride]
    d0 = phase[::stride]

    n = min(len(d0), len(d1), len(d2), len(d3))

    v_arr = d3[:n] - 3 * d2[:n] + 3 * d1[:n] - d0[:n]

    s = np.sum(v_arr * v_arr)

    if n == 0:
        n = 1

    h = np.sqrt(s / 6.0 / float(n)) / float(tau0 * mj)
    e = h / np.sqrt(n)
    return h, e, n