On Solana mainnet-beta, was slot 287264516 skipped, meaning no block was produced and confirmed in it? Answer true or false.
On Solana mainnet-beta, in which epoch number does slot 261951103 fall? Answer with the whole number only.
On Solana mainnet-beta, what is the block height of the block produced in slot 357772724? Answer with the whole number only.
On Solana mainnet-beta, was slot 339444163 skipped, meaning no block was produced and confirmed in it? Answer true or false.