[填空题]
A bakery has designed a bkkrzc* mm+9 3g5q8u2z1g em kxox to deliver their speciality birthday cakes.+4 hgjcw1,vqa The box has a rectangular prism bv,jah+gcw4 1 qase, with a rectangular pyramid top, as illustrated in the diagram below with dimensions shown.
After the cake is put into the box, the outside of the box is completely wrapped in colourful gift paper.
Point O shown on the diagram is the midpoint of the base of the pyramid.
1.Find the value of a shown in the diagram; the slant height of one of the pyramid faces. cm
2.Find the total outer surface area of the box to be wrapped in gift paper. $cm^2$
