Using "for loop" in MATLAB to finish this problem?

The problem is below. They ask for basically 2 vectors and to use a for loop to check each element and add to get the total precipitation for part a) for example. Can any of you guys help me out? I had the program I wrote adding the elements in part a), but it was not giving me the total precipitation, only the total sum of the elements. If you guys could help me with a, b, or part C, I would be insanely grateful!

*"The average monthly precipitation (in.) for Boston and Seattle during 2012 are given in the vectors below (data from the U.S. National Oceanic and Atmospheric Administration).

BOS=[2.67 1.00 1.21 3.09 3.43 4.71 3.88 3.08 4.10 2.62 1.01 5.93]
SEA=[6.83 3.63 7.20 2.68 2.05 2.96 1.04 0.00 0.03 6.71 8.28 6.85]

Where the elements in the vectors are in the order of the months (January, February, etc.) Write your program to answer the following:

(a) Calculate the total precipitation for the year and monthly average precipitation in each city. Do NOT use MATLAB’s built-in functions sum and mean. (b) How many months was the precipitation above the average in each city? (c) How many months, and on which months, was the precipitation in Boston lower than the precipitation in Seattle?"*

Answer 1

[Deen Halis]

Hi John, you can try this for a) Boston as an example

 BOS=[2.67 1.00 1.21 3.09 3.43 4.71 3.88 3.08 4.10 2.62 1.01 5.93];

t_bos = 0;

for i1 = 1:numel(BOS)

      t_bos = t_bos + BOS(i1);
      m_bos(i1) = t_bos;
  end
  m_bos