Modelling Rate Problems

It is often said that "Australia is the driest continent in the world".  It might not seem like it recently, as we have had 110% of the 2019 annual rainfall already in May.  So when we look at a water rate, we have a number of interestin STEM problems.  Let's look at the Mathematical part in this problem.

A photograph of the water meter that measured the flow of water shown in the "rate notice" below. Note that this meter is read when somebody walks past the house, ducks under the bushes and finds the meter.
This water "rate" notice was for 89 days between February 2020 and May 2020

Questions Related to the Rate Notice

1. What was the total amount of water (in litres ) was used at this house during these three months?
2. What was the daily rate of water consumption (per day ) for this house? ( Hint: divide the total amount by the number of days )
3. What was the daily cost of the water consumption at this house? (Hint: similar method to the one above)
4. What would be a better STEM solution to problem of measuring and billing water consumption? ( Hint: Look at this web page )
5. Oh .. If you missed last week's questions ... look here!