\times 10^{-4}$ to $5.5 \times 10^{-5}$ for the given range of $\beta$. $\eta_{\text{V}}$ increases from $1.33 \times 10^{-4}$ to $1.33 \times 10^{-3}$ for the same interval of $\beta$. The scalar spectral index, $n_{s}$ decreases as $\beta$ decreases. $n_{s}$ varies from 0.97 to 0.93 in the given range of $\beta$. The tensor-to-scalar ratio decreases from $9.2 \times 10^{-3}$ to $8.9 \times 10^{-4}$ when $\beta$ changes from -0.02 to 0.05. The magnitude of the running of the spectral index is maximum around Starobinsky model. The amplitude of the scalar primordial curvature perturbation increases from $6.2 \times 10^{-10}$ to $5.0 \times 10^{-9}$ as $\beta$ increases.

  -------- ------- ------- -------------- ----------------------- ------------------- ------- -------------
                                $r$        $\epsilon_{\text{V}}$   $\eta_{\text{V}}$              $A_s$
                            $(10^{-3}) $        $(10^{-4})$          $(10^{-4}) $       $$     $(10^{-9})$
   $ -20$   57.45   0.973       9.23               5.77                  1.33          -7.67      0.62
   $-10$    43.76   0.967       6.35               3.97                  2.35          -7.88      0.85
    $-1$    35.41   0.961       4.60               2.88                  3.46          -7.95      1.13
     0      34.64   0.960       4.44               2.78                  3.60          -7.95      1.17
    $1$     33.90   0.960       4.29               2.68                  3.73          -7.95      1.20
    $10$    28.27   0.954       3.15               1.97                  5.08          -7.89      1.58
    $20$    23.63   0.947       2.27               1.42                  6.79          -7.73      2.13
    $50$    15.31   0.927       0.89               0.55                  13.3          -6.90      5.00
  -------- ------- ------- -------------- ----------------------- ------------------- ------- -------------

  : These are the cosmological parameters 