In the following sequence,

1,4,2,8,5,7,1,4,2,8,5,7,$\dots$

(a) What number is in the 50th position?

(b) What is the sum of the first 63 numbers?

(a) 1

(b) 271

(b) 271

(a) 2

(b) 273

(b) 273

(a) 3

(b) 275

(b) 275

(a) 4

(b) 277

(b) 277

None of the above