SAS Proc Ttest finding differences and where statement - sas

Question

DATA OZONE;
INPUT MONTH $ STMF YKRS ##;
CARDS;
A 80 66 A 68 82 A 24 47 A 24 28 A 82 44 A 100 55
A 55 34 A 91 60 A 87 70 A 64 41 A . 67 A . 127 A 170 96 A . 56
JN 215 93 JN 230 106 JN . 49 JN 69 64 JN 98 83 JN 125 97
JN 72 51 JN 125 75 JN 143 104 JN 192 107 JN . 56 JN 122 68
JN 32 20 JN 23 35 JN 71 30 JN 38 31 JN 136 81 JN 169 119
JL 152 76 JL 201 108 JL 134 85 JL 206 96 JL 92 48 JL 101 60
JL 133 . JL 83 50 JL . 27 JL 60 37 JL 124 47 JL 142 71
JL 75 49 JL 103 59 JL . 53 JL 46 25 JL 68 45 JL . 78
S 38 23 S 80 50 S 80 34 S 99 58 S 71 35 S 42 24 S 52 27 S 33 17
;
run;
Proc Ttest data=Ozone PLOT=NONE ALPHA=0.01;
Where MONTH='JN';
Paired STMF*YKRS;
Run;
Question 2
Data Baseball;
Input ba league;
Datalines;
276 National League
288 National League
281 National League
290 National League
303 National League
257 American League
254 American League
263 American League
261 American League
Run;
Proc Ttest data=Baseball ALPHA=0.02 ;
Question 3
Proc Ttest data=ozone ALPHA=0.01 Plot=NONE;
Where Month='A'-'S';
Paired STMF*YKRS;
Run;
Question 2 Test to see if both leagues have different batting averages. Use a alpha = 0.02 in your conclusions and compute a 98% confidence interval for the means.
Question 3 From the first question test to see the differences the A and S average ozone values. Use alpha = 0.01 in your conclusions. Include a 99% confidence interval for the difference.
So my questions are for Question 2 kind of a stupid question but for whatever reason I am confused as to what you are suppose to do.
For question 3 (my main question) how do I use one proc ttest to check and see the differences between months A and S? I tried using a Where statement as you can see above, but of course that does not work I’m abit stomped on where to go from here. Also I omited a good bit of the month data in the ozone portion as I couldn't properly format all of the data without it looking extremely confusing.
Thanks for your help in advance!