Calculate the Missing Value with Ohm's Law

Create a function that calculates the missing value of 3 inputs using Ohm's law. The inputs are v, r or i (aka: voltage, resistance and current).

Ohm's law:

V = R * I

Return the missing value rounded to two decimal places.

Examples

ohmsLaw(12, 220, "") ➞ 0.05

ohmsLaw(230, "", 2) ➞ 115

ohmsLaw("", 220, 0.02) ➞ 4.4

ohmsLaw("", "", 10) ➞ "Invalid"

ohmsLaw(500, 50, 10) ➞ "Invalid"

Notes

• Missing values will be ""
• If there is more than one missing value, or no missing value, return "Invalid"
• Only numbers will be given.