please help 3 questions mathmatics for business

At the beginning of each year, Mahmood will deposit $4,200 into a savings deposit. Find the amount of his annuity due in 12 years if funds earn 8%, m=2. O A. $164,146.94 OB. $66,598.74 O C. $302,844.95 O D. $170,712.81 If money is worth 10%, m=4, find the number of payments (n) and number of deferred period (d) of a deferred annuity with a sequence of quarterly payments of $1,000 each for 10 years, with the first payment due at the end of 2.5 years. O A. n = 40; d = 9 OB. n = 9; d = 40 O C. n = 40; d = 10 O D. n = 10; d = 40 MGN Press Ltd. received a $890 bill from its paper supplier, dated August 1, with terms 3/10, 2/20, 1/30, net/60. How much should MGN Ltd. Press pay their supplier on August 21? OA. $845.50 OB. $872.20 O C. $890.00 O D. $863.30