errors on giles

anita@anita-laptop:~/sandbox/homework$ ruby giles_innocent.rb 
Loaded suite giles_innocent
Started
EEEEEEE
Finished in 0.001415 seconds.

  1) Error:
test_arrest(Giles_Test):
NameError: undefined local variable or method `cops' for #<Giles_Test:0xb7ccc68c>
    giles_innocent.rb:28:in `test_arrest'

  2) Error:
test_death(Giles_Test):
NameError: undefined local variable or method `giles' for #<Giles_Test:0xb7ccc678>
    giles_innocent.rb:24:in `test_death'

  3) Error:
test_frustration(Giles_Test):
NameError: undefined local variable or method `giles' for #<Giles_Test:0xb7ccc650>
    giles_innocent.rb:16:in `test_frustration'

  4) Error:
test_incarceration(Giles_Test):
NameError: undefined local variable or method `giles' for #<Giles_Test:0xb7ccc628>
    giles_innocent.rb:32:in `test_incarceration'

  5) Error:
test_radar(Giles_Test):
NameError: undefined local variable or method `giles' for #<Giles_Test:0xb7ccc600>
    giles_innocent.rb:20:in `test_radar'

  6) Error:
test_scream(Giles_Test):
NameError: undefined local variable or method `child' for #<Giles_Test:0xb7ccc5d8>
    giles_innocent.rb:12:in `test_scream'

  7) Error:
test_setting(Giles_Test):
NameError: undefined local variable or method `giles' for #<Giles_Test:0xb7ccc5b0>
    giles_innocent.rb:8:in `test_setting'

7 tests, 0 assertions, 0 failures, 7 errors
anita@anita-laptop:~/sandbox/homework$