.8 f() is differentiable function and (f(c) g(z)) is differentiable at a =a. then (1) g(x) must be differentiable at z = a (2) if g(z) is discontinuous, then fl

.8 f() is differentiable function and (f(c) g(z)) is differentiable at a =a. Then (1) g(x) must be differentiable at z = a (2) if g(z) is discontinuous, then fla) = 0 3) if fla) #0, then g(r) must be differentiable 4) none of these