a company which is making 200 mobile phones each week will increase its production the number of mobile phones will increase by 25 if week from 200 in week 1 to 225 in week 22 250 in week 3 and so on until it will produce 850 mobile phones in how many weeks will it produce 850 mobile phones?

a. 27
b. 21
c. 26
d. 28​