$15.$

$1.$ Two servers in a restaurant predict how many guests will come for dinner in the next $4$ days. The first server predicts the number of guests to be $23$ for day $1,35$ for day $2,30$ for day $3,$ and $28$ for day $4.$ The second server predicts $\backslash (26,27,28\backslash ),$ and $29$ for the $4$ respective days. The actual attendance turns out to be $\backslash (30,22,31\backslash ),$ and $25.$ Who has the bigger forecast bias? What are the MSE and the MAE for the two servers?