Consider a file named rainfall.txt that contains records of rainfall. Each line in the file contains the name of a place, a date and the recorded rainfall in mm$.$ Given below is a sample content of this file:

Gordons Bay,$2019/03/01,12$

Johannesburg,$2019/01/30,25$

Hammanskral,$2019/04/12,7$

Mamelodi,$2019/06/23,1$

Port Elizabeth,$2019/10/19,3$

$($a$)$ State the format of the data in this file. $(2$ marks$)$

$($b$)$ Which function can be used to open the file rainfall.txt for reading only? $(2$ marks$)$

$($c$)$ Which function can be used to open the file rainfall.txt for writing data at the end of the file without deleting the existing content? $(2$ marks$)$

$($d$)$ Assume that the file was successfully opened for reading. Which function can be used to read a line in the file and return an array of three substrings by splitting this line? $(3$ marks$)$

$($e$)$ Write code to copy the contents of rainfall.txt to rainfall$\_$new.txt$.(2$ marks$)$

$($f$)$ Write code to rename the file rainfall.txt to rainfall$\_$old.txt$.(2$ marks$)$

$($g$)$ Write code to delete the file rainfall$\_$old.txt$.(2$ marks$)$