$1.$ Two servers in a resta VU$09$ urant predict how many guests will come for dinner in the next four 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 $26,27,28,$ and $29$ for the four respective days. The actual attendance turns out to be $30,22,31,$ and $25.$ Who has the bigger forecast bias? What are the MSE and the MAE for the two servers?