A manager has been using a certain technique to forecast demand for gallons of ice cream for the past six periods. Actual and forecasted amounts are shown below.

$\backslash$table$[[$Period$,$Demand,Forecast$],[1,90,87],[2,85,88],[3,91,87],[4,92,89],[5,95,90],[6,88,92]]$

If the errors are assumed to be normally distributed with $CL=0,LCL=-4\mathrm{.}5$ and UCL$=+4\mathrm{.}5,$ in which period are