SQL Question

[KDV]

I have following table which is stored in MS Access database

Col1 Col2 Col3
A 3.2 25/10/2000 9:30:00 AM
A 2.1 25/10/2000 10:10:02 AM
A 1.5 25/10/2000 1:00:02 PM
A 2.3 25/10/2000 2:10:05 PM
A 10 26/10/2000 9:10:10 AM
A 1.2 26/10/2000 9:10:11 AM
A 4.8 26/10/2000 1:00:08 PM

I want to use SQL query so that I can achieve the following:

Problem 1: Pick only those records (At the most one per each day) based on
max value of Col2 (Max value should be within the context of one day). So it
should give me following result
set
A 3.2 25/10/2000 9:30:00 AM (Max value picked on Day 25/10/2000)
A 10 26/10/2000 9:10:10 AM (Max value picked on Day 26/10/2000)

Problem 2: Pick only those records (At the most one per each day) based on
min value of Col2 (Min value should be within the context of one day). So it
should give me following result
set
A 1.5 25/10/2000 1:00:02 PM (Min value picked on Day 25/10/2000)
A 1.2 26/10/2000 9:10:11 AM (Min value picked on Day 26/10/2000)

Problem 3: Pick only those records (At the most one per each day) based on
most recent value of Col3 (Most recent value value should be within the
context of one day). So it should give me following result
set
A 2.3 25/10/2000 2:10:05 PM (Most recent value(based on time) picked on
Day 25/10/2000)
A 4.8 26/10/2000 1:00:08 PM (Most recent value(based on time) picked on
Day 26/10/2000)


NOTE: