So anyone can help?

a)

Volume  of  pool    =    [ area  of a trapezoid  with bases of  1m, 1.3m   and height  of 12]  *   4

So we  have

(1/2) (12)  ( 1 + 1.3)    *  4   =

6 ( 2.3)  *  4   =

24 * 2.3  =

55.2  m^3     =   55.2 * (1000 L)  =  55,200 L

b ) Time it takes to fill the pool   =    55,200  / 7.5   =  7360 min

2)  Cost

2.75   (55.2)  = 152.625  pounds

Thank goodness, we have a correct answer now!