The holes from the ladder's feet can be filled in by carefully using the end of the hoe.

Put the top on the tank very carefully. 

Remind  the owners that the tank needs to be left alone, un bothered for the night and (especially if there are children in the house) tell them that the water tube is very fragile at this point and not to touch it.

8.  Thoroughly clean and store all your tools, use the wire scrubby, and clean up the work site.

Day 4

This is the easiest day.  Everything should be done before breakfast!

Someone will use the screwdriver and carefully drill out the cement that is inside the water tube (more or less without putting pressure on the tube).

You will need some cement and water for painting the tank and paint brushes.  Someone  will need to get into the tank to paint. Others can work outside.

If the inside passes are rough or need some patching, scrape the inside of the tank using the float to smooth & roughen the surface.

Begin with a watery version of cement water.  Then, a little later, add more cement and a bit of sand and make it thicker to be used inside.

If patching needs to be done , use the thick version (paste), use your fingers to fill the holes with the cement paste. Go over it with the brush to smooth it out.