$1.$ Consider the following algorithm.$$

$$

if $(($average $>=90)$ and $($average $<100))$:

$$ print$($Student earns an A$)$

elif $(($average $>=80)$ and $($average $<90))$:

$$ print$($Student earns a B$)$

elif $(($average $>=70)$ and $($average $<80))$:

$$ print$($Student earns a C$)$

elif $(($average $>=60)$ and $($average $<80))$:

$$ print$($Student earns a D$)$

else:

$$ print$($Student earns an F$)$

$$

Does the condition $$if $(($average $>=80)$ and $($average $<90))$ NEED to be a compound condition?$$ In other words, could the condition

elif $(($average $>=80)$ and $($average $<90))$:

be replaced with the condition

elif $($average $>=80)$:

and maintain the correctness of the algorithm or is the compound condition required to maintain correctness?