Please explain to me how to do the m by Hand and in MS Project. Construction Project management

Problem 1

Task	Days	Predecessor
1	2 days
2	5 days	1
3	6 days	1
4	10 days	3
5	8 days	2,4
6	7 days	3
7	6 days	6
8	4 days	5,7
9	4 days	5
10	8 days	8,9

Problem 2

Task	Days	Predecessor
1	2 days
2	5 days	1
3	6 days	1
4	11 days	3
5	9 days	3
6	10 days	5
7	10 days	2,6,4
8	7 days	3
9	6 days	8
10	4 days	7,9
11	4 days	7
12	8 days	10,11

Problem 3

Task	Days	Predecessor
1	5 days
2	8 days	1
3	6 days	1
4	15 days	3
5	12 days	3
6	10 days	5
7	8 days	2,6,4,9
8	11 days	3
9	7 days	8
10	8 days	7
11	4 days	7
12	2 days	10,11

Problem 4

Task	Days	Predecessor
1	2 days
2	5 days	1
3	6 days	1
4	11 days	3
5	12 days	3
6	10 days	5
7	8 days	2,6,4,15
8	9 days	3
9	7 days	8
10	2 days	7
11	4 days	7,16
12	2 days	10,11,19
13	7 days	3
14	8 days	13
15	5 days	9
16	14 days	3,8
17	7 days	1
18	4 days	17
19	2 days	18

Problem 5

Task	Days	Predecessor
1	2 days
2	5 days	1
3	6 days	1
4	10 days	3
5	8 days	2,4
6	11 days	3
7	3 days	6
8	4 days	5,7
9	9 days	5
10	7 days	8,9