Which expression is equivalent to
`\left(\frac{1}{2}a+5\right)\left(\frac{3}{2}a+1\right)` ?
2a^2 + 5
4a^2 + 5
3/4a^2 + 16a + 5
3/4a^2 + 8a + 5
`\left(\frac{1}{2}a+5\right)\left(\frac{3}{2}a+1\right)` ?
2a^2 + 5
4a^2 + 5
3/4a^2 + 16a + 5
3/4a^2 + 8a + 5