please assist

In 1932, the US Mint changed the composition of pennies from all oopper to :dnc with copper ooating. Pennies made prior to 1982 weigh 3.1 grams. Pennies made since 1982 weight 2.5 grams. Suppose you have a bag of 1316 pennies, and the bag weighs 3637.8 grams. Let .7: represent the number of pennies made prior to 1932 and let y represent the number of pennies made after 1982. Set up the system of equations. 1I.I'i."rite the equation that represents the total number of pennies. :1=:l 1I.I'i."rite the equation that represents the total weight of the pennies. IQ=M Honr many pennies from each time period are there in the bag? Number of pennies made prior to 1932: C] Number of pennies made after 1982: C]