Please fill in the gaps within the given code. They are marked by $???$ and commented with # task $1,$ # task $2,$ # task $3$ and # task $4.$

The Python function print$\_$scheme$($end$)$ shall generate a number pattern based on the end parameter.

The function prints a grid of numbers, each element obtained by multiplying the row number by $10$ and adding the column number.

The last number in the pattern is printed separately on its own line.

If the end value is a negative number or zero, the function shall print the following error message and return early:

Please use a positive end value!

For example:

Test Result

print$\_$scheme$(3)$

$11,12,13$

$21,22,23$

$31,32,33$

$33$

Answer:$($penalty regime: $0\%)$