I have two problems that I am having trouble with someone please help!! Thanks

1)Farmer John has 1200 feet of fencing and wishes to use it to fence a rectan-gular plot divided into two subplots as in the gure below. What are the dimensionsof the plot with maximum area?

2)

Find the absolute maximum and absolute minimum values of

f(x) = 3x4 + 4x3−12x2+ 7

on the interval [−1;2].