how to add last $=6$ optional function. import random

def rollem$($first$,$ last$)$:

$"""$

Returns the sum of two random numbers.

The numbers generated are between first and last $($inclusive$).$

Example: rollem$(1,6)$ can return any value between $2$ and $12.$

Parameter first: The lowest possible number

Precondition: first is an integer

Parameter last: The greatest possible number

Precondition: last is an integer, last $>=$ first

$"""$

#generating num$1$ and num$2$ randomly in range $[$first$,$ last$]$

num$1=$ random.randint$($first$,$last$)$

num$2=$ random.randint$($first$,$last$)$

result $=$ num$1+$ num$2$ #storing num$1+$ num$2$ in result

thesum $=($result$)$

return thesum