The table mat below is made up of identical semi – circles and a 31-cm square.

(a) Find the perimeter of the entire table mat.

(b) Half of the table mat shaded. Find the area of the shaded part. $(Take \pi = \frac{22}{7})$

(a) 152cm

(b) 553.5cm

(b) 553.5cm

(a) 154cm

(b) 555.5cm

(b) 555.5cm

(a) 156cm

(b) 557.5cm

(b) 557.5cm

(a) 158cm

(b) 559.5cm

(b) 559.5cm

None of the above