Electrostatic Potential and Capacitance Part 2

A capacitor has capacitance 5µF 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 ‌

d

2

is inserted between the plates. Capacitance of the capacitor in the presence of slab will be _______ µF.