SQL Server - Feq Questions to clarify

Hello All,
1. If i have my Latest full backup on Sunday , and there by i have my differntial Backups daily ( mon, tue till sat) , and if i want to restore on friday, Tell me the procedure
Ans : I am not sure i am right - but sharing my view and correct me if i am wrong - I will take the latest full backup on sunday , and there by i will pick all the Differntial Backups ( Mon, TUe, Wed, thur) & Start restoring all one by one
i.e - sunday Fullbackup + Monday Diff Backup + Tuesday Diff Backup + Wednesday Diff Backup + thurs Diff Backup .
If i am wrong, please guide me the right formate of restoring
Q2 : If my DB is configured to Replication And my secondary Server DB 's Ldf file has grown and i have to shrink , Whats the method i should adopt, Is it normal shrinking process which we adopt for stand alone DB or is there different process to shrink if
the DB if its configured for replication.
Q3 : What is the best way to identify the if the sql instance is suffering from Memory issue or an CPU ? please suggest me the best way , apart from using tools like solar winds etc.
hemadri

1. nope
Differential means it will contain all changes from last full backup
so all that you would require to apply would be the last full backup on Sunday + latest differential backup on Thur
2. see if this helps
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/dae1484d-1a7e-4008-b55a-1e9f41de3c2b/shrink-database-for-replicated-db?forum=sqlreplication
You cant shrink T- Log directly though if its a replicated db
3. One method is to use query involving DMVs
Another way is using performance counters
http://www.grumpyolddba.co.uk/monitoring/Performance%20Counter%20Guidance%20-%20SQL%20Server.htm
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