Treasury Secretary Scott Bessent sarcastically offered to give Sen. Elizabeth Warren a tutorial on “Foreign Exchange for Dummies” in a blistering response to her criticism of the government’s intervention to prop up the Japanese yen, The Post has learned. The lefty Massachusetts senator’s recent attack “unfortunately reveals that you know even less about foreign exchange markets than you do about banking,” Bessent wrote in a letter dated Thursday that was exclusively obtained by The Post. “Terrifyingly, the opening paragraph is wrong about where the money came [from], what the transaction was, and whether there was even a borrower,” he added....