[BLK-544] part 1

[BLK-544] part 2

[BLK-544] part 3

[BLK-544] part 4

[BLK-544] part 6

[BLK-544] part 7

[BLK-544] part 8

[BLK-544] part 9

[BLK-544] part 10

[BLK-544] part 11

[BLK-533] part 4

[BLK-254] part 2