The key answer of exercise 10

a)

1. Project; projected
2. decreased; decrease
3. appealed; appeal
4. recorded; record
5. permits; permitted

b)

1. The environmental group Ocean Project has projected that sea levels will rise one metre in the next fifty years.
2. Fortunately, malaria has decreased in recent years, and the decrease is due to the use of nets and pesticides.
3. When a major charity appealed for donations to help the deaf, their appeal was broadcast mainly via radio.
4. Bonnie Tyler recorded her song Total Eclipse of the Heart in 1983, and in 2008 it set a record for the most popular karaoke track ever.
5. Tourists in a well-known site were given permits to take photos, but they were not permitted to take in their cameras.

c)

1. Project → N; projected → V
2. decreased → V; decrease → N
3. appealed → V; appeal → N
4. recorded → V; record → N
5. permits → N; permitted → V

d)

1. Project; projected
2. decreased; decrease
3. appealed; appeal 
4. recorded; record
5. permits; permitted 

Appeal has the same syllable stress in the noun and verb form. The other have different stress.