What exactly is the ORACLE_HOME location ?
According to the sapinst_ora_environment.log you have supplied the ORACLE_HOME=F:\oracle\<SID>\11203 but the installer (sapinst) is trying to call sqlplus from D:\oracle\<SID>\11203/bin
SAPINST: End of output of SQL executing program D:\oracle\<SID>\11203/bin/sqlplus.
Is Oracle installed on D drive or F drive ?
Regards
RB