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Am trying to write a structure to store weather data for a particular month.

total rainfall

High temp

Low temp

Average temp

Am trying to calculation but not getting anywhere.

I need help please.

(1)Not sure how to add the 12 rainfall to get the total rainfall and the average rainfall

(2) Add the average temp to get the yearly average temp

(3) Find the highest and the lowest temps and the month they occur in

I have complete the structure for the month but its the calculation is giving me problem