Study the incomplete code below that calculates the total rainfall and average rainfall for Cape Town during May in mm$.$

Select two $(2)$ options below for the correct code $($i$)$ and $($ii$)$ that will perform the necessary calculations.

$[$Incorrect options will be negatively marked$]$

double$[]$ rainfall $=\{20\mathrm{.}5,15\mathrm{.}2,10\mathrm{.}8,5\mathrm{.}3,5\mathrm{.}0,5\mathrm{.}5,5\mathrm{.}7,10\mathrm{.}1,15\mathrm{.}9,25\mathrm{.}4,30\mathrm{.}2,22\mathrm{.}6\}$;

$//-------($i$)-----------$

$//$total rainfall

$//-------($ii$)-----------$

$//$average rainfall

$//$print

Console.WriteLine$("$Total rainfall for Cape Town in May $($mm$)$:$"+$ totalRainfall$)$;

Console.WriteLine$("$Average rainfall for Cape Town in May $($mm$)$: $"+$ averageRainfall$)$;

a$.$

$//-------($i$)-----------$

$//$total rainfall

double totalRainfall $=0$;

for $($int i $=0$; i $<$ rainfall.Length; i$++)$

$\{$

totalRainfall $+=$ rainfall$[$i$]$;

$\}$

b$.$

$//-------($ii$)------------$

$//$average rainfall

double averageRainfall $=0$;

averageRainfall $=$ totalRainfall $/$ rainfall.Length;

c$.$

$//-------($i$)-----------$

$//$total number of rainfall

double totalRainfall $=0$;

for $($int i $=0$; i $<$ rainfall.Length; i$++)$

$\{$

totalRainfall $=$ rainfall$[$i$]++$;

$\}$

d$.$

$//-------($ii$)------------$

$//$average rainfall

double averageRainfall $=$ totalRainfall $/$ rainfall.Length $-1$;

e$.$

$//-------($i$)-----------$

$//$total number of rainfall

double totalRainfall $=0$;

for $($int i $=0$; i $<$ rainfall.Length$-1$; i$++)$

$\{$

totalRainfall $=$ rainfall$[$i$]++$;

$\}$

f$.$

$//-------($ii$)------------$

$//$average rainfall

double averageRainfall $=$ rain