$G_1$ and $G_2$ are the slopes of the approach and departure grades of a vertical curve, respectively.
Given $\left|G_1\right|<\left|G_2\right|$ and $\left|G_1\right| \neq\left|G_2\right| \neq 0$
$\text{Statement 1:} +G_1$ followed by $+G_2$ results in a sag vertical curve.
$\text{Statement 2:} -G_1$ followed by $-G_2$ results in a sag vertical curve.
$\text{Statement 3:} +G_1$ followed by $-G_2$ results in a crest vertical curve.
Which option amongst the following is true?
- $\text{Statement 1}$ and $\text{Statement 3}$ are correct; $\text{Statement 2}$ is wrong
- $\text{Statement 1}$ and $\text{Statement 2}$ are correct; $\text{Statement 3}$ is wrong
- $\text{Statement 1}$ is correct; $\text{Statement 2}$ and $\text{Statement 3}$ are wrong
- $\text{Statement 2}$ is correct; $\text{Statement 1}$ and $\text{Statement 3}$ are wrong