[填空题]
The following cumulative frequency diagram shows t :yebkkj.-v7 ni ,7zughe lengths of 80 pieces of 0-+8 4b banbbzcy zwi/string8wzz nia+b b0b4/-cyb, 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.