*taps* hello? is anyone alive in this thread?
Table:
slab of any kind make 2 or 4 blocks
surround those slabs with same kind but only top half
New Chair:
place half slab
place signs on side like normal chair
attach painting to back of chair
High New Chair
place normal block
surround in slabs (recommended but not required)
place pressure plate on block
attach painting to back of the pressure plate