?Help? Me????? Please??

Answer:
a. 0.5
b. 1.14
c. the rain needs to fall 1.1932 in, the department from the average is -0.3768in.
Step-by-step explanation:
a. 0.67 - 0.17 = 0.5 inches
b. 1.5 - 0.36 = 1.14 inches
c. let x be the rain that need to fall in August
1.5: 1.57 = 1.14: x
1.5x = 1.57(1.14)
1.5x = 1.7898
x = 1.1932 inches
1.57 - 1.1932=0.3768 inches