帮忙分析一下新概念3--lesson5 The facts

帮忙分析一下新概念3--lesson5 The facts1.The article began:'Hundreds of steps “”“”“”“lead”“”“”“”“ to the high wall which surrounds the president's palace.'2.he had at last been allowed to send a fax in which he informed the editor that he had been arrested while counting the 1084 steps ”“”“”“”“”“”“”leading“”“”“”“”“”“ to the 15-foot wall which surrounded the president's palace.这2句话中的2个lead 是不是一个过去分词作定语,一个现在分词作定语?那么分别怎么解释呢?