::::: Answer ::::::::::::::::::::::
Simplifying the Equation :
[tex]a = \frac{1}{2} \times 8 \times h[/tex]
[tex]= \frac{8}{2} \times h[/tex]
[tex]= 4 \times h[/tex]
[tex]= 4 h[/tex]
Then
[tex]\text{if h = 6} \longrightarrow a=4\times 6=24[/tex]
[tex]\text{if h = 7} \longrightarrow a=4\times 7=28[/tex]
[tex]\text{if h = 8} \longrightarrow a=4\times 8=32[/tex]
[tex]\text{if h = 9} \longrightarrow a=4\times 9=36[/tex]
