Q$3.$ NFT $($Non fungible Token$)$ are sold to the community within $2$ weeks they are released.

After they are in community, people who bought them have $3$ options:

Option $1$: they can keep them and don't sell them

Option $2$: they can sell certain amount of them at the market

Option $3$: they use them to receive Level $1$ token. If an owner collects $3$ NFT he can have $1$

Level $1$ token. $($in other words, for $3$ NFT you can have $1$ Level $1$ token$)$

At the end we want to calculate the total value of NFT as follows: $1$ Levell token values $4$ NFT$.$

That means the owner will receive $1NFT$ as a gift and in total have his $3$ original NFT $+4$ NFT

from Level$1.$

Develop the stock flow diagram for this model. Include model units and equations.