Hello shushi.shashimi (yummy) 
Good morning to you. Welcome to Homework Forum, soon you'll know
the people here.
I'm not an F&N student, but I can try to help you a
little.
Step 1) Identify the key words
'consuming food high
in fats may lead to health problems. investigate
the role in fats
in planning meals for a
particular group of people'.
Step 2) Try listing down what you know, what you don't know,
what you need to find out. This is call the problem definition
template (PDT). It's widely use in higher education to help
students in their learning process.
What do you know about fats and its related diseases in
general?
What are the effects of fats on people with health problems?
Fats in general can mean a lot of things, and when it comes to
food, it's generally regard as fats from animals and in my case I
always like to include oil (liquid in room temperature). I'm not
very healthy because I have High Cholesterol and my nutritionist
recommended me for a low-fat diet and my principal doctor put me on
pills to bring down my cholesterol. My doctor say if my cholesterol
remains high, it's not going to be good for my heart as I have a
higher chance of suffering stroke. 
What you need to do is to find out about the types of fat (and
oil), and what does it do to the body. The role of fat in the body?
Also research on the health problems caused by consuming high-fat
diet for prolong time. Like my case is high cholesterol. Of course
there are many more problems that can be caused by 'too much fat'
in the body.
Lastly, when you're planning meals for a particular group of
people with high risk of cardiovascular problems, what are the
things you need to take note of? Less fat/oil definitely!
Best regards,
Chin Seng
P.S. Please come back to this forum more often okay?
thank you!