<image>There are several small balls in an opaque bag that are identical except for their color. Each time, Xiaoming draws a ball from the bag, records its color, and then puts it back. This experiment is repeated 1000 times, with the results recorded as follows: \frac{}(1) In the table, a=_, b=_;
(2) Estimate the probability of drawing a red ball from the bag as approximately _; (accurate to 0.1)