The function given by upper a left parenthesis t right parenthesis equals 0.0265 t cubed minus 0.444 t squared plus 1.774 t plus 8.76a(t)=0.0265t3−0.444t2+1.774t+8. 76, 0 less than or equals t less than or equals 100≤t≤10, can be used to estimate the amount, in billions of dollars, invested by large oil companies in exploration for new reserves t years after 19951995. find the relative extreme points, and sketch a graph of the function.