Help: Nernst and reversal potentials

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To find the reversal potential for a membrane equally permeable to sodium and potassium, the Goldman equation can be used, considering the concentrations of both ions inside and outside the cell. For a membrane permeable to sodium, potassium, and chloride, the same equation applies, incorporating the chloride ion concentration as well. The Nernst potential for each ion can be calculated using the Nernst equation, which takes into account the specific internal and external concentrations provided. The values for Cl-, K+, Na+, and Ca2+ are critical for accurate calculations. Understanding these potentials is essential for analyzing neuronal excitability and membrane dynamics.
madbeemer
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I know the following
ion/inside cell/outside cell
Cl- 5mM 150 mM
K+ 130mM 5mM
Na+ 20mM 140mM
Ca2+ 10^-4mM 2mM

How would I find the reversal potential for conductance equally permeable to sodium and potassium?
How do I find the reversal potential for a conductance equally permeable to sodium, potassium, and chlorine?
Also, how do I find the nernst potential for each ion at the below external and internal concentrations?
 
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