Match each Imperial Unit to the correct Engineering Unit.

$\backslash$table$[[-=,2^{\text{'}}-\frac{63}{4^{\text{'}\text{'}}},2180],[-=,2^{\text{'}}-\frac{21}{8^{\text{'}\text{'}}},2560],[-=,2^{\text{'}}-\frac{71}{2^{\text{'}\text{'}}},2620],[-=,2^{\text{'}}-\frac{21}{2^{\text{'}\text{'}}},2060],[-=,2^{\text{'}}-\frac{3}{4^{\text{'}\text{'}}},]]$