1. On average,a 60 minutes radio show has 45 minutes of actual programme. Lets assume that the probability distribution of the number of minutes of actual radio programme is uniformly distributed with a range of 40 minutesto 50 minutes.
   1. Compute the probability that the show will have at least 48 min of actual programming time (3)
   2. Compute the standard deviation. (3)
   3. Draw the graph of f(x) clearlylabelling the axes (4)