Xiaoming is a coin collector. He wants to change 3.50 yuan notes into 1 minute, 2 cents and 5 cents. He demanded that the total number of coins be 150. The number of 2-cent coins is not less than 20, which is a multiple of 4, and the number of 5-cent coins is more than 2 points. Please help Xiao Ming design all the exchange schemes according to his requirements.

1 is divided into x2 and y5 is divided into z.

x+2y+5z=350

x+y+z= 150

y≥20

z & gty

Y is a multiple of 4, and you can find that:

1.x=85，y=20，z=45

2.x=82，y=24，z=44

3.x=79，y=28，z=43

4.x=76，y=32，z=42

5.x=73，y=36，z=4 1