[填空题]
A bakery has designed a k*lvj hr.r,q y4xyq,5box fpzgu g 5678xjto deliver their speciality birthday cakes. The box has a rectangular prism base, with a rectangular pyramid top, as illustrated in the diagram below with dimensions s57f6p8g u jzxghown.
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. $cm^2$
