The function defined by f (x) = sin x has zeros at every integer. Show that when

The function defined by f (x) = sin πx has zeros at every integer. Show that when −1 < a < 0 and
2 < b < 3, the Bisection method converges to
a. 0, if a + b < 2
b. 2, if a + b > 2
c. 1, if a + b = 2