Q$1)$ write postgresql code

In the last $7$ days how many users made more than one purchase in a day $($per day$)?$ What is the total daily revenue from such users? Please arrange the output by date

The output will have $7$ rows and $3$ columns: Date, total revenue, unique users

Table Name: purchase info

$\backslash$table$[[$User$\_$id$,$Action,date purchase$\_$type,dollar$\_$amount,purchase$\_$id$],[$abc$,$purchase$\_$complete,$2020-06-10$ Gold,$1\mathrm{.}00,$xt$246],[$abc$,$purchase$\_$complete,$2020-06-11$ Gold,$1\mathrm{.}00,$xy$239]]$