A capacitor has capacitance $5\mathrm{\mu F}$ when it’s parallel plates are separated by air medium of thickness d. A slab of material of dielectric constant $1.5$ having area equal to that of plates but thickness $\frac{\mathrm{d}}{2}$ is inserted between the plates. Capacitance of the capacitor in the presence of slab will be……………$\mathrm{\mu F}$.