The stem-and-leaf display below gives the fuel efficiencies (in miles per gallon) for a sample ofnew cars. Use the display to answer the following questions.

Fuel efficiency (miles per gallon)

1|4 8 2|3 99 3|3 334 7 7 8 4|4 589 5|1 489

Key:1|4means a fuel efficiency ofmiles per gallon.

(a)

What is the highest fuel efficiency in the sample overall?

(b)

What is the lowest fuel efficiency in the 30s?

(c)

How many cars in the sample have fuel efficiencies in the 40s?