[填空题]
A bakery has designed a box to deliver theiri3 fil sco72:h speciality birthday cake6+umzguhzq1gw9v :k kpc3h2 - s. The box has a rectangular prism base,ggup623 hz-h+cv:k1 qzw u k9m 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. $cm^2$
