A sum of ₹ x amounts to ₹8,563.50 in $$3\frac{1}{2}$$ years and to ₹10,527 in 7 years at y % p.a. simple interest. The value of x and y, respectively, are

A

6600 and 8

B

6800 and $$8\frac{1}{2}$$

C

6600 and $$8\frac{1}{2}$$

D

7000 and 8