In the sequence of positive numbers x1, x2, x3, . . . , what is the value of x1 ?

(1) xl = ~$\frac{x_{l-1}}{2}$~ for all integers l > 1
(2) x5 = ~$\frac{x_{4}}{x_{4}+1}$~

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

EACH statement ALONE is sufficient.

Statements (1) and (2) TOGETHER are NOT sufficient.