A chemical $($Cp $=3\mathrm{.}3$ kJ$/$kgK$)$ following at the rate of $20000$ kg$/$hr enters aparallel flow heat exchanger at $120\backslash$deg C$.$ The flow rate of cooling water $($Cp $=4\mathrm{.}186$ kJ$/$kg K$)$ is $50000$ kg$/$h with an inlet temperature of $20\backslash$deg C$.$ The heat$-$transfer surface area is $10$ m$2$ and the overall heat transfer coefficient is $1050$W$/$m$2$K$.$ Calculate the $($a$)$ effectiveness of the heat exchanger, and $($b$)$ outlettemperatures of water and chemical.