Let u(t) be a continuously differentiable function taking non-negative values fort>0 and satisfying u0- 4u (t); u(0) = 0. then (a) ut) = 0 (b) u(t) = t for 0

let u(t) be a continuously differentiable function taking non-negative values fort>0 and satisfying u0- 4u (t); u(0) = 0. Then (A) ut) = 0 (B) u(t) = t for 0