I need help solving this problem, can you show all 7 steps

You are looking to study abroad next semester in Portugal. You try to determine how much cash you will need for spending money because you are concerned with transaction/currency conversion fees. You poll the students who went on the trip last semester regarding how much cash they feel is appropriate (given their experience). Of the 25 that you sampled, they averaged $1264 with a standard deviation of $120. Find a 95% confidence interval of the true average amount of cash needed