arithmetic and geometric sequence and their summation

(1)John bought a car for $200000in 1999.it is known that the value of his car depreciated by 10% each year before 2005.
(a) Find the values of his car in 2000 and 2001 respectively
(b) When did the value of his car below $120000 ?

(2) Anthony deposits $20000in a bank at the begining if a year at a fixed interest reat of 6% p.a. , compounded yearly, Find the minimum number of years that is needed for the total amount to exceed $30000?