) Brian's retirement savings are projected to grow at an annualized rate of 5 percent. He plans to spend 30 thousand dollars per year during his retirement. Set up a dif- ferential equation for his savings, y(t), in $1000s at t years since retirement. O (a) y = 0.05y - 30 O (b) y = 0.05y + 30 O (c) y'= 30y - 0.05 O (d) y = 30y + 0.05 O (e) None of the above