PQRS is a parallelogram (in Figure). QM is the height from Q to SR and QN is the height from Q to PS. If SR = 12 cm and QM =7.6 cm. Find :

**(a)** the area of the parallelogram PQRS

**(b)** QN, if PS = 8 cm.

**(a)** the area of the parallelogram PQRS

**(b)** QN, if PS = 8 cm.