// op.upper(): Returns the string value converted to upper case.
// op.includes(array, value[, index]): Determines whether an array includes a certain value among its entries, returning true or false as appropriate.
// to be filled -- filter and get the highest mpg in the USA.
// to be filled -- filter for cars only made from USA, sort in decending order, and select a subset of collumn to show for 5 rows only.
// to be filled -- find answer for each region
// to be filled -- change the unit for the weights
Purpose-built for displays of data
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