Given the boring log below. Calculate the $N_{1,60}$ for samples $1,3$ and $5.$ Samples $1,3$ and $5$ were

obtained from the standard penetrating test, and the corresponding blow counts are the $N$ values.

The tests were conducted using a USA$-$style donut hammer in a $6-$in$.$ diameter boring using a

standard sampler with the liner installed. Assume the dry unit weight of subsurface soil is $110$

pcf$.(50$ pts$)$