Design and implement $($using Solidity programming language$)$ a simple smart contract

for a $$crowdfunding platform$.$ The contract should accept contributions $($i$.$e$.,$ digital

coins$)$ from users and only release the funds to a certain party $($whose address has been

recorded in the contract$)$ if the total contributions reach a certain amount. Write appro$-$

priate comments in code. Design information can be included in code comments.