How could we recover the database if my transaction log gets corrupted / anything will happ.

Suppose I have FullBackup say, Full1.bak

after this i have taken the differential backup say, diff1.bak

and have schedule transaction file backup for every 1 hour say, trn1.bak

trn2.bak.... it took upto trn5.bak

if my trn3.bak corrupts then in this case how can i restore the database?

2nd condition if my diff1.bak corrupts then how could i restore the database?