Create datagrams that will transmit original data accross network

Hello, everyone. I apologize in advance if i do something wrong in this sub, as this is my first time. I was hoping if i could get some input on this question i was given below. I'm a bit confused on how to break down data packets. The question is stated below as;

"The original IP Datagram is given below. This datagram arrives at a network where the MTU is 1200 bytes. Fill in the blanks in as many IP fragments that will be created to transmit the original data across this network"

i am then given the original datagram here https://imgur.com/a/5TOJtUJ

followed by 6 more empty datagram diagrams. and a list of "notes";

1. The FLAGS field contains bits.
2. Fragments are sent with the maximum amount of data possible.
3. Ignore the CHECKSUM and DATA fields.
4. The fragments may be fragmented further, if necessary

Does this mean that i subtract 1200 from 4020 for every iteration? What about the other factors? do they change too as i fill in the rest of the datagrams? What i did is subtract the amount, and decrease TTT by 1 for every datagram i made, everything else stayed the same more or less, but i have no way of checking if i'm correct.

I don't mind doing most of the problem solving myself, since i want to learn how to do it on my own eventually. But i'm having a really difficult time doing the first iteration, so even just a nudge in the correct direction, or some readings would help immensely. The textbook i have is either not that helpful or sometimes too difficult to understand at first.