Can u guys PLEASE answer question a and f

Answer:
a) 0.61
b) 1.06
Step-by-step explanation:
a) v = u + at
12 = 6 + 9.8t
9.8t = 6
t = 6 ÷ 9.8 = 0.612244898
t = 0.61
f) w = ¾(gk)
7.4 = ¾ (9.31k)
9.31k = 7.4 × 4/3
9.31k = 9.86666667
k = 9.8666667 ÷ 9.31
k = 1.059792338
k = 1.06