the following columns represent year, month, monthly solar radio flux, and monthly sunspot number.

using matlab create a code that import this data as txt file. Create a plot of the monthly solar radio flux and monthly sunspot number with its corresponding legend, make a scatter plot of both variables and finally make smoothing of monthly mean data by 13 month running mean and plot results.

1964 4 72.60 12.90
1964 5 69.50 14.30
1964 6 69.00 13.50
1964 7 67.00 4.80
1964 8 69.30 13.80
1964 9 70.20 7.00
1964 10 73.40 9.20
1964 11 73.70 11.10
1964 12 78.80 22.10
1965 1 78.60 25.40
1965 2 75.20 20.80
1965 3 74.10 17.50
1965 4 72.00 10.20
1965 5 78.20 34.50
1965 6 77.00 23.30
1965 7 74.30 17.30
1965 8 74.80 13.30
1965 9 76.60 24.50
1965 10 80.20 29.10
1965 11 77.70 22.80
1965 12 77.80 24.70
1966 1 87.90 40.30
1966 2 84.20 35.30
1966 3 90.30 36.40
1966 4 97.20 69.00
1966 5 98.50 64.20
1966 6 96.30 67.70
1966 7 106.70 80.20
1966 8 106.60 72.60
1966 9 110.90 71.10
1966 10 108.60 81.20
1966 11 113.30 81.00
1966 12 124.60 99.80
1967 1 147.70 157.00
1967 2 147.00 132.60
1967 3 160.60 158.30
1967 4 129.90 98.40
1967 5 143.00 122.50
1967 6 120.20 95.40
1967 7 140.30 129.50
1967 8 153.70 151.80
1967 9 132.10 108.70
1967 10 136.10 125.00
1967 11 145.30 133.60
1967 12 163.00 179.00
1968 1 189.10 172.50
1968 2 173.20 158.50
1968 3 142.60 130.50
1968 4 129.50 115.00
1968 5 154.90 180.00
1968 6 142.30 156.20
1968 7 137.20 136.20
1968 8 142.20 154.80
1968 9 141.00 166.00
1968 10 152.50 152.50
1968 11 138.50 121.70
1968 12 148.40 155.50
1969 1 152.70 147.80
1969 2 155.20 170.50
1969 3 172.30 192.30
1969 4 155.50 151.10
1969 5 145.40 169.90
1969 6 162.20 150.10
1969 7 136.60 137.10
1969 8 143.00 138.80
1969 9 137.30 129.30
1969 10 154.00 135.40
1969 11 156.70 132.40
1969 12 143.60 138.60