A bank is tracking the $10-$day performance of asset P and asset Q on a rolling

basis. The previous $10$ day mean for P and Q were $6\mathrm{.}13$ and $6\mathrm{.}36.$ Today$$s price for

P and Q are $7\mathrm{.}46$ and $5\mathrm{.}17.$ The price $11$ days ago for P and Q were $5\mathrm{.}79$ and $5\mathrm{.}84.$

What is the new $10$ days rolling covariance?