what is the payment priority for corporate finance?

Coupon Y 15 15 YIM? 3. Note the following: Issue Par A XYZ Subordinated Notes Due 12/31/21 B XYZ Mortgage Notes Due 12/31/39 $5,000 C XYZ Senior Notes Due 9/1/29 D XYZ Junior Subordinated Notes Due 12/31/21 $1. TM 1.75% 3.2% Price $1,000.98 $4,978.77 3.17% 1.95% $1,005,86 What is their order of payment priority