The following sh script snipped will $($select all that apply$)$:

$...$

i$=3$

j$=7$

a$=`$expr $i $+$ $j$`$

b$=`$expr $j $/$ $i$`$

echo $"$$a $b$"$

$...$

invoke an external program called expr

calculate the sum and quotient of i and j

print the values of variables a and b on the terminal screen

print the string "expr $3+7$ expr $3/7"$ on the terminal screen