How many blocks of Fig. $9\mathrm{.}1$d loading can be applied to a small, smooth

uniaxial rod of RQC$-100$ steel if the given axis has a scale of $200$ units $=$

$100$MPa, according to the $S-N$ approach? Repeat the calculations if a

notch of $K_t=1\mathrm{.}5$ and a notch root radius equal to $5mm$ had existed, where

$K_t$ and nominal stress history are based on the net cross$-$sectional area.