So that's 310 Degrees Kelvin, or Simply 310 Kelvin divided by Z, which is basically one in this case divided by F farades constant, which is about 96,500. Now, the concentration of potassium outside, according to our table, is five millimolar. And outside or inside, is 130 millimolar. So we have five on top and 130 on the bottom. So we have log of this ratio multiplied by this. We plug in our values and we get negative zero point 87 volts or equivalently.