Complete the following zig-zag structure so that it represents (2R,3S)-2,3-butanediol. 
Definitions:
Variable Inductors
Inductors whose inductance can be adjusted or varied, often used in radio equipment for tuning and filtering applications.
Tuning
The process of adjusting the frequency of a receiver to match the frequency of the desired signal.
High-pass Filter
An electronic filter that allows frequencies higher than its cutoff frequency to pass through while attenuating frequencies lower than the cutoff frequency.
Load Resistor
A resistor used in a circuit to simulate an electrical load, typically for testing purposes or to dissipate energy.
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