Suppose function `k` gives the volume of water in a pool (in liters) in terms of the number of minutes, `t`, that have elapsed since you started filling that pool.

1. `k` represents:
   
   • the number of minutes that have elapsed since you started filling the pool
   • the name of the function
   • the volume of water in the pool in liters
   • the output of the function
   • None of the above
   
   
   
2. Use function notation to represent the volume of water in the pool `23` minutes after you started filling it up.
    
   
   
3. Use function notation to represent the volume of water in the pool `70` minutes after you started filling it up.