Place the following events in the correct chronological order.

Songhai overtook Mali.
Sundiata took over Ghana.
Mansa Musa brought scholarship to Mali.
Mali became the center of trans shara trade.

1. Sundiata took over Ghana.

2. Mali became the center of trans-Saharan trade.
3. Mansa Musa brought scholarship to Mali.
4. Songhai overtook Mali.