Solve for young modulus of soil using $\text{'}$N$\text{'}$ value blows of $23$

$E_s^{\text{'}}(kPa)=700(N_1{)}_{60}$

$(N_1{)}_{60}=$ SPT blow count corrected to $1$ tsf of overburden pressure and $60\%$ of the theoreticalfree$-$fall hammer energy.

Note: $100$kPa~~$1tsf.$