"(6) to acquire real and personal property, or any interest in real or personal property, by gift, purchase, transfer, foreclosure, lease or otherwise including rights or easements; to hold, sell, assign, lease, encumber, mortgage or otherwise dispose of any real or personal property, or any interest therein, or mortgage any interest owned by it or under its control, custody or in its possession; t" . . . . . . . . . . .