[填空题]
The following cumulative frekv9zf 5z zw+wg so:91eg f,vksuv-d+8quency-kewdt ) yny -og9bjx gve(43y +)*yqy diagram shows the lengths of 80 pieces of strevn g4ye3d *+yy 9ox-kb)g q -tyy)w(jing, in cm.
1.Find the median length.
The following frequency table also gives the lengths of the 80 pieces of string.
2.(1)Write down the value of q.
(2)Find the value of p.