जैन परंपरा के अनुसार, तीसरे तीर्थंकर भगवान संभवनाथ ने केवल ज्ञान प्राप्त करने से पहले कितने वर्षों तक तपस्या की थी?

In which year AD was the Jain Council held at Vallabhi under the leadership of Devardhi Kshamasramana to codify Jain canons?

Where did the final council take place for the collection and compilation of the Svetambara Jain Agamas/Prakrit texts?