Those are right ...........................
hope helps with the first the rest i cant read its not clear.
You could use the Arithmetic Explicit formula, which is a_n = a1 + (n-1)d
a_n=nth term
a1 = first term
n = # of terms
d = common difference
Using this, you would find that the price of the share stock would be $52 on the 11th day.
Hope I helped! Good luck! :)
One is 5% of 20 I believe