Write SQL code to extract the average length by Make from the table Automobile $.$

$```$

$|$ automobile$\_$id $|$ make $|$ length $|$ height $|$ price $|$

$|----------------$:$|$:$------------|---------$:$|---------$:$|-----------|$

$|1|$ alfa$-$romero $|168\mathrm{.}8|48\mathrm{.}8|16500|$

$|2|$ alfa$-$romero $|171\mathrm{.}2|52\mathrm{.}4|16500|$

$|3|$ audi $|176\mathrm{.}6|$ nan $|13950|$

$|4|$ audi $|176\mathrm{.}6|54\mathrm{.}3|17450|$

$|5|$ audi $|$ nan $|53\mathrm{.}1|15250|$

$```$

Complete the code to return the output

$```$

SELECT

Make,AVG$($Length$)$ as Average$\_$Length

FROM

Automobile

write code here Make;

$```$

Expected Output

Fill in the blanks

$94$ s

Complete the statement below to change the white spaces to $"\_"($underscores$)$ for the column educ$\_$level $.$

Complete the code to return the output

$```$

SELECT write code here $($educ$\_$level, $\text{'}\text{'},\text{'}\_\text{'})$ as "Level of Education"

FROM students

LIMIT $3$;

$```$

Expected Output

Level of Education

elementary$\_$school

junior$\_$high$\_$school

high$\_$school