Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. The leaf of a corn plant has a resistance of \(2.0 \mathrm{M} \Omega\) measured between two electrodes placed \(20 \mathrm{~cm}\) apart along the leaf. The leaf has a width of \(2.5 \mathrm{~cm}\) and is \(0.20 \mathrm{~mm}\) thick. What is the resistivity of the leaf tissue? Is this greater than or less than the resistivity of muscle tissue in the human body?