I need help understanding the results in red. What formulas were used?

DATA TABLE First height data Second height data Third height data Height h (m) 0.25 0.37 0.52 Trial 1 0.2193 0.2698 0.3208 Trial 2 0.2345 0.2579 0.3376 Trial 3 0.2437 0.2855 0.3129 Time t (s) Trial 4 0.2129 0.2911 0.3417 Trial 5 0.2288 0.2766 0.3194 Average time t (s) 0.2278 0.2762 0.3265 g =2h/t2 g =2h/ t2 g =2h/t2 Calculated value of g =2(0.25 m) / (0.228 s)2 =2(0.37 m)/ (0.276 s)2 =2(0.52 m)/ (0.327 s)2 (m/ $2). Show your = 9.62 m/$2 = 9.71 m/ $2 =9.73 m/ $2 calculations Average value of the gravitational acceleration g (m/ $2) 9.69 m/$2 % Error of g % Error = |9.69 - 9.80 | /9.80 x100 = 1.1% Show you calculation. 9 = 9. 8 m / 52