Consider the following statements : 1. dy dx at a point on the...

Consider the following statements : 1. $\frac{\mathrm{dy}}{\mathrm{dx}}$ at a point on the curve given slope of the tangent at that point. 2. If $a(t)$ denotes acceleration of a particle, then $\int \mathrm{a}(\mathrm{t}) \mathrm{dt}+\mathrm{c}$ gives velocity of the particle. 3. If $s(t)$ gives displacement of a particle at time $t$, then $\frac{\mathrm{ds}}{\mathrm{dt}}$ gives its acceleration at that instant. Which of the above statements is/are correct?