5. Let $\{ak\}$ be a sequence of data which is multiplied with a pulse shaping function $h(t)$. The transmitted signal is given by $x(t) = \sum{k=-\infty}^{\infty} ak h(t-kTs)$. At the receiver, we sample this signal every $Ts$ seconds to get the discrete signal $x[n] = \sum{k=-\infty}^{\infty} a_k h[n-k]$ for every integer $n$.

i) (7pt) Derive the condition on \( h(t) \), in time domain, such that there will be no inter-symbol interference?