integration within specified limits

I have the data file attached below. I have to take the square of column no. two of this data file and then have to integrate it from time '3' sec to time '6' sec. Please help me out with this.

Thanks in advance

Answer 1

[Walter Roberson]

data = readmatrix('Data.xlsx');
mask = data(:,1) >= 3 & data(:,1) <= 6;
t = data(mask,1);
x2 = data(mask,2).^2;
trapz(t, x2)

[Sonia Goyal]

Thanks a lot.