a) Determine the percent increase in the area of a circle,if its radius (r) is increased by

a) Determine the percent increase in the area of a circle,

if its radius (r) is increased by

12%.

b) Determine the percent increase in the area of a square, if the length of every side (x) is increased by 12%.

c) Determine the percent increase in the area of a parallelogram, A = hb, if its height (h) is increased by 12% but its base (b) stays the same.

d) Determine the percent increase in the area of a triangle, A = hb/2,

if its height (h) is increased by 12% and its base (b) is increased by 12%.

Please show step by step how the solution has come about so it is easily understandable. Thank You very much!