On Solana mainnet-beta, what is the parent slot of the block produced in slot 405052500? Answer with the whole number only.
On Solana mainnet-beta, in which epoch number does slot 379899828 fall? Answer with the whole number only.
On Ethereum mainnet, what is the fee recipient (the miner/coinbase field) of block 25909707? Answer with the 0x address only.
On Solana mainnet-beta, is the account So11111111111111111111111111111111111111112 marked executable (a program account)? Answer true or false.