1. The number of sides of a regular polygon whose each exterior angle has a measure of 20\(°\) is .
2. The measure of each exterior angle of a regular polygon of 36 sides is \(°\).
3. \(MNOP\) is a rectangle. Its diagonals meet at \(S\). Find \(y\) if \(MS = 5y+\)6 and \(NS = 4y+\)15.
The value of \(y\) is