$(20\%)$ Given the production data in the table below

$\backslash$table$[[$Year$,$Month,BOPM$],[5,1,3535],[2,3214],[3,3386],[4,3136],[,5,2813],[,6,2722],[,7,2633],[,8,2479],[,9,2356],[,10,2237],[,11,2291],[,12,2150],[2,1,2086],[,2,1845]]$

a$.$ Estimate the effective decline rate $(\%/$year$).$

b$.$ Estimate the nominal decline rate $(\%/$year$).$

c$.$ If the final rate is $10$ STB$/$D$,$ estimate the remaining reserves.

d$.$ Estimate the remaining life.