Confusing quesition

A person weighing 604.4 N is moving from the 1st to the 6th floor in a lift. As the lift approaches the the 6th floor, it decreases its upward speed from 8.8 ms-1 to 2.6 ms-1. in 2.5 s. What is the average force exerted by the lift floor on the person during this time?

Do i have to use F=ma? I tried and got the wrong answer :/ so not sure what to do. Thank you for the help in advance

Have you drawn a force diagram? What was the actual answer and what did you do?

Nope i cant really draw ( trying not to sound too dumb ), i dont know the answer, its an online quiz so i wont know unless i get it right, the answer i keep on getting is 149N but its not right

You don't need to be able to draw to draw a force diagram, you just need to be able to make arrows with a pen. You've got a force going down - the person's weight - and a force going up, the reaction force from the floor of the lift. Since the person is accelerating (or rather, decelerating), we know that these forces aren't balanced. Since F=ma, we also know that the resulting force is equal to the person's mass times their acceleration.

i keep on getting 149 as the force but it says wron

What's your working?

The simplest way to do this is is use suvat to find acceleration.

Then looking at the person in the lift use F=ma: R-604.4=(604.4/9.81)a
R is the normal reaction force of the person on the lift