In a rectangular open channel, the flow is critical, and the flow depth is $2 \mathrm{~m}$. Select the correct statement(s)
- Specific energy for the flow is $3.0 \mathrm{~m}$
- Specific energy for the flow is $2.0 \mathrm{~m}$
- Froude number is $1$.
- Froude number is $1.5$
