page 12 (exercises)
EXERCISE 1
*-*-*-*-*-
EXERCISE 2
*-*-*-*-*-
EXERCISE 3
*-*-*-*-*-
EXERCISE 4
*-*-*-*-*-
EXERCISE 5
*-*-*-*-*-
EXERCISE 1
*-*-*-*-*-
EXERCISE 2
*-*-*-*-*-
EXERCISE 3
*-*-*-*-*-
EXERCISE 4
*-*-*-*-*-
EXERCISE 5
*-*-*-*-*-